Powered by Google-Search & Google-Books www.ChineseStandard.net Database: 169759 (Feb 21, 2021)
HOME   Quotation   Tax   Examples Standard-List   Contact-Us   View-Cart
  

GB 31604.3-2016

Chinese Standard: 'GB 31604.3-2016'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusRelated Standard
GB 31604.3-2016English70 Add to Cart 0--10 minutes. Auto immediate delivery. Method for analysis of hygienic standard of polyethylene resin for food packaging Valid GB 31604.3-2016
GB 31604.3-2016Chinese15 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]

  In 0~10 minutes time, full copy of this English-PDF will be auto-immediately delivered to your email. See samples for translation quality.  

BASIC DATA
Standard ID GB 31604.3-2016 (GB31604.3-2016)
Description (Translated English) Method for analysis of hygienic standard of polyethylene resin for food packaging
Sector / Industry National Standard
Classification of Chinese Standard X09
Word Count Estimation 4,459
Date of Issue 2016-08-31
Date of Implementation 2017-03-01
Older Standard (superseded by this standard) GB/T 5009.59-2003; GB/T 5009.58-2003
Regulation (derived from) Announcement of the State Administration of Public Health and Family Planning 2016 No.11

GB 31604.3-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard –
Food Contact Materials and Products –
Determination of Resin Drying Weight Loss
食品安全国家标准 食品接触材料及制品 树脂干燥失重的测定
ISSUED ON. AUGUST 31, 2016
IMPLEMENTED ON. MARCH 1, 2017
Issued by. National Health and Family Planning Commission of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Principle ... 4
3 Apparatus ... 4
4 Analytical Procedures ... 4
5 Expression of Analytical Results ... 5
6 Precision ... 5
National Food Safety Standard –
Food Contact Materials and Products –
Determination of Resin Drying Weight Loss
1 Scope
This Standard specifies the determination of resin drying weight loss in food contact
materials and products.
This Standard is applicable to determination of polyethylene resin and polystyrene
resin drying weight loss in food contact materials and products.
2 Principle
The weight loss on drying polyethylene resin at 90°C~95°C, polystyrene resin at 100°C;
namely, the drying weight loss, it indicates the existence of volatile substances in this
condition.
3 Apparatus
3.1 Balance. sensibility is 0.1g.
3.2 Electrothermal constant temperature dry box.
3.3 Flat weighting bottle. diameter 40mm.
4 Analytical Procedures
4.1 Sampling method
Operate as per GB 5009.156.
4.2 Determination of specimen
4.2.1 Polyethylene resin
Weigh 5g~10g (accurate to 0.1mg) of particle specimen, put into the constant-weight

GB 31604.3-2016
(Food safety national standard - Food contact materials and products - Determination of resin loss on drying)
Book People's Republic of China National Standard
GB 31604.49-2016
National Food Safety Standard
Determination of food contact materials and articles arsenic, cadmium, chromium, and measured arsenic, cadmium, chromium, nickel, lead, antimony, zinc migration of lead
Issued on. 2016-10-19
2017-04-19 implementation
People's Republic of China
National Health and Family Planning Commission released
Book GB 31604.49-2016
Foreword
Instead of the standard SN/T 2829-2011 Determination of electrical heavy metal content "food contact materials metal materials in food simulants
Inductively coupled plasma emission spectrometry ", SN/T 2597-2010" food contact materials polymer materials lead, cadmium, chromium, arsenic, antimony, germanium move
Move content - Inductively coupled plasma atomic emission spectrometry "and SN/T 2594-2010" food contact materials cork lead,
Cadmium, chromium, arsenic by inductively coupled plasma mass spectrometry, "arsenic, cadmium, chromium, nickel, lead, antimony and zinc migration and paper products and cork
Arsenic, cadmium, chromium, lead element content determination.
This standard compared with SN/T 2829-2011, SN/T 2597-2010 and SN/T 2594-2010, the main changes are as follows.
--- Standard name was changed to "Determination of the national food safety standards for food contact materials and articles arsenic, cadmium, chromium, lead and arsenic, cadmium,
Chromium, nickel, lead, antimony, zinc migration determination. "
GB 31604.49-2016
National Food Safety Standard
Determination of food contact materials and articles arsenic, cadmium, chromium, and measured arsenic, cadmium, chromium, nickel, lead, antimony, zinc migration of lead
1 Scope
This standard specifies the materials and articles in contact with food the food simulants arsenic, cadmium, chromium, nickel, lead, antimony and zinc migration was measured after soaking
Inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry; provides paper products cork and arsenic, cadmium, chromium, lead elements
Determination by Inductively Coupled Plasma Mass Spectrometry.
This standard applies to all types of food contact materials and articles of arsenic, cadmium, chromium, nickel, lead, antimony, zinc migration determination, as well as paper products and soft
Arsenic, cadmium, chromium, lead determination in cork.
The first part of the determination of arsenic, cadmium, chromium, lead
Inductively Coupled Plasma Mass Spectrometry
Principle 2
After paper products cork and pulverized using nitric acid digestion, the resulting solution was diluted with water, constant volume, by inductively coupled plasma mass spectrometry
Measured, compared with standard series quantitation.
3 Reagents and materials
Unless otherwise indicated, the reagents used in this method are excellent pure water as a water GB/T 6682 regulations.
3.1 Reagents
3.1.1 nitric acid (HNO3).
3.1.2 argon (Ar). purity ≥99.99%, or liquid argon.
3.1.3 helium (He). purity ≥99.995%.
3.2 reagent preparation
Nitric acid solution (5 + 95). Measure 50mL of nitric acid was slowly added 950mL of water, and mix.
3.3 Standard
3.3.1-element standard stock solution (1000mg/L or 100mg/L). arsenic, cadmium, chromium, lead and grant the adoption by the National Certification Standards Certificate
The single element or elements of the standard stock solution.
3.3.2 internal standard stock solution (1000mg/L or 100mg/L). scandium, germanium, indium, rhodium, rhenium, bismuth and other uses by the National Certification and award criteria
Single-element certificate or substance-element standard stock solution.
GB 31604.49-2016
3.4 Standard Solution
3.4.1 series of mixed standard solution. Imbibe right amount of single element standard stock solution or multi-element mixed standard stock solution with a nitric acid solution
(5 + 95) dubbed serial dilution series of mixed standard solution, the concentration of each element can refer to Table 1. Series of mixed standard solution was transferred to a clean preparation
Net polyethylene bottle save.
Note. You can determine the concentration of the standard series solution and range of the element according to the sensitivity of the instrument, the linear range of the sample solution and the actual content of each element.
Table 1 mixed standard solution series
Element Standards Series No. Concentration/(μg/L) Series 1 Series 2 Series 3 Series 4 Series 5 Series 6
1 As 0 0.200 1.00 5.00 10.0 20.0
2 Cd 0 0.0200 0.100 0.500 1.00 2.00
3 Cr 0 0.500 1.00 5.00 10.0 20.0
4 Pb 0 0.500 2.00 10.0 20.0 50.0
3.4.2 internal standard solution (1mg/L). take appropriate internal standard single element stock solutions or multi-element internal standard stock solution to prepare a solution of nitric acid (5 + 95) to a suitable concentration of multi-element internal standard solution.
Note. The standard solution can be manually dosed in the preparation of mixed standard series of the sample solution and the solution can also join online by the instrument. If the sample injection volume
And the internal standard injection volume was 20.1, the concentration of the internal standard recommendations formulated as 1mg/L ~ 2mg/L; if the sample injection volume and the internal standard injection volume was 1.1, concentration of the internal standard recommendations formulated as 50μg/L ~ 100μg/L. 3.4.3 use instrument tuning solution. According to the requirements, instrument, take appropriate instrument tuning stock solution with a nitric acid solution (5 + 95) formulated in a suitable concentration tuning solution.
4 instruments and equipment
Note. All glassware and digestion PTFE inner tank must be made in the nitric acid solution (1 + 5) Soak overnight, rinse with ultrapure water reserve.
4.1 Inductively coupled plasma mass spectrometry (ICP-MS).
4.2 Analysis of balance. a sense of the amount of 0.1mg.
4.3 Microwave Digestion. digestion with Teflon inner tank.
4.4 Pressure digester. equipped with a teflon digestion tank inside.
4.5 thermostatic oven (oven).
4.6 temperature control heating plate.
4.7 ultrasonic water bath.
4.8 sample grinding equipment.
Step 5 Analysis
5.1 Sample Preparation
Take appropriate sample, the sample with a cutter mill cutting or grinding into powder, and mix.
5.2 Sample Digestion
5.2.1 Microwave Digestion
Weigh 0.5g pulverized sample (accurate to 0.1mg), placed within the Teflon digestion tank, adding 5mL ~ 8mL nitrate,
GB 31604.49-2016
Stamped place 1h, the digestion vessel sealed into a microwave digestion systems, microwave digestion instrument in accordance with standard operating procedures digestion, reference may be
A. 6. digestion digestion conditions. After the end of the digestion, the digestion tank out of digestion, digestion tank until completely cooled and then slowly open the inner cover,
Rinse twice with a small amount of water to cover the merger digestion tank. The digestion vessel temperature on a hot plate heated at 140 ℃ 30min, or placed
Ultrasonic bath ultrasonic degassing tank 5min, all the digestion fluid is transferred to 50mL volumetric flask with water to volume, mix, test. with
When do sample blank.
5.2.2 Pressure Digestion
Weigh 0.5g pulverized sample (accurate to 0.1mg), placed within the Teflon digestion tank, adding 5mL ~ 8mL nitrate,
Stamped place 1h, within the digestion tank sealed in stainless steel tanks, put in oven temperature digestion can refer to A. Digestion conditions were 6
Digestion. After the end of digestion, digestion tank until completely cooled and then slowly open the inner cover, rinse twice with a small amount of water in the digestion tank lid merger.
The digestion vessel temperature on a hot plate heated at 140 ℃ 30min, placed in an ultrasonic bath or ultrasonic tank degassing 5min, all the digestion solution
Transferred to a 50mL volumetric flask with water to volume, mix, test. While doing a sample blank.
5.3 Instrument Reference conditions
5.3.1 using instrument tuning use solution to optimize working conditions of the instrument, the instrument reference conditions, see A. 1, the reference element analysis mode, see A. 2.
Note. there is no suitable instrument to eliminate the interference pattern, the interference correction equations requires the use of arsenic, cadmium, lead measurement result is corrected interference correction equations can be found
A. 3.
5.3.2 Under the chosen instrument conditions, edit determination, choose the internal standard measured elements and the quality of Element-charge ratio, see reference conditions A. 1
And A. 2.
5.4 standard curve
After the mass spectrometry signal intensity of the blank solution, in order from low to high were measured in mixed standard solution series Mass letter of each element
Signal strength, the standard curve based on the measured elements and its internal standard element mass spectrometry signal intensity ratio and the corresponding concentration of the element.
5.5 Determination of the sample solution
MS signal intensity ratio of the sample solution and the blank solution samples each measured element and its internal standard element are determined from a standard curve
Calculate the amount of each measured element. If the measured result is outside the linear range of the standard curve to dilute acid solution and then perform the corresponding matrix
Determination.
6 expression analysis
Content of the analyte in the sample according to the formula (1).
Where.
Content X --- analyte in the sample, in units of milligrams per kilogram (mg/kg);
Ρ --- concentration of analyte in the sample solution, in micrograms per liter (μg/L);
The concentration of the sample ρ0 --- blank solution measured elements, in micrograms per liter (μg/L); Vp --- sample digestion constant volume by volume, in milliliters (mL);
1000 --- conversion factor.
When the analyte content ≥1.00mg/kg, the calculation result to three significant figures, when the content of <1.00mg/kg, the calculation results
GB 31604.49-2016
Two significant digits.
7 precision
Two independent determination results under the absolute difference in repeatability condition must not exceed 10% of the arithmetic mean.
8 Other
In sample weight 0.5g, 50mL volume to calculate the detection limit of the elements shown in Table 2.
Table 2 method detection limit of the elements
As Cd Cr Pb element
The detection limit/(mg/kg) 0.01 0.0005 0.02 0.02
Quantitative limits of these element are shown in Table 3.
Table 3 method limit of quantification of the elements
As Cd Cr Pb element
The limit of quantification/(mg/kg) 0.04 0.002 0.05 0.05
The second part of the determination of arsenic, cadmium, chromium, nickel, lead, antimony, zinc migration of
The first Inductively Coupled Plasma Mass Spectrometry
Principle 9
Using food simulants soaked part of food contact materials and articles in contact with food expected, the soaking liquid atomized into the carrier gas, etc.
Plasma torch in an inert argon gas at high temperature and evaporation, dissociation, after atomization and ionization into the mass spectrometer, the mass spectrometer according to the mass to charge ratio
Isolation and characterization, for a given mass to charge ratio, which is proportional to the concentration of the test solution in signal intensity measured elements, compared with standard series quantitation.
10 Reagents and materials
Unless otherwise indicated, the reagents used in this method are excellent pure water as a water GB/T 6682 regulations.
10.1 Reagents
10.1.1 argon (Ar). purity ≥99.99%, or liquid argon.
10.1.2 nitric acid (HNO3).
10.1.3 helium (He). purity ≥99.995%.
10.1.4 formulated food simulants required reagents. according to GB 31604.1 requirements.
GB 31604.49-2016
10.2 reagent preparation
10.2.1 food simulants. GB 5009.156 formulated in accordance with the provisions.
10.2.2 nitric acid solution (5 + 95). Measure 50mL of nitric acid was added to 950mL of water, and mix.
10.3 Standards
10.3.1 element stock standard solution (1000mg/L or 100mg/L). arsenic, cadmium, chromium, nickel, lead, antimony and zinc adoption by the National Certification and grant
Single or multi-element reference material certificate element standard stock solution.
10.3.2 internal standard stock solution (1000mg/L or 100mg/L). scandium, germanium, indium, rhodium, rhenium, bismuth and other elements by a single national accreditation standards and grant certificates or material element stock standard solution .
10.4 Standard Solution
10.4.1 mixed standard working solution. Imbibe right amount of single element standard stock solution or multi-element mixed standard stock solution with the corresponding food mold
Quasi was formulated by diluting the standard series hybrid solution, the concentration of each element are shown in Table 4. Series of mixed standard solution was transferred to a clean preparation of polyethylene
Ene bottle save.
Note. You can determine the concentration of the standard series solution and range of the element according to the sensitivity of the instrument, the linear range of the sample solution and the actual content of each element. If the
Selected food simulant is neutral or alkaline, you need to add the appropriate amount of nitric acid so that the concentration of nitrate solution is about 5% (volume fraction).
Table 4 series of mixed standard solution
Element Standards Series No. Concentration/(μg/L) Series 1 Series 2 Series 3 Series 4 Series 5 Series 6
1 As 0 0.500 5.00 10.0 50.0 100
2 Cd 0 0.200 1.00 2.00 5.00 10.0
3 Cr 0 1.00 5.00 10.0 50.0 100
4 Ni 0 0.500 5.00 10.0 50.0 100
5 Pb 0 0.500 5.00 10.0 50.0 100
6 Sb 0 0.100 1.00 10.0 50.0 100
7 Zn 0 0.500 5.00 10.0 50.0 100
10.4.2 an internal standard solution (1mg/L). take appropriate internal standard single element stock solutions or multi-element internal standard stock solution to prepare a solution of nitric acid (5 + 95) to a suitable concentration of multi-element internal standard solution.
Note. The standard solution can be manually dosed in the preparation of mixed standard series of the sample solution and the solution can also join online by the instrument. If the sample injection volume
And the internal standard injection volume was 20.1, the concentration of the internal standard recommendations formulated as 1mg/L ~ 2mg/L; if the sample injection volume and the internal standard injection volume was 1.1, inside
Standard concentration recommendations formulated as 50μg/L ~ 100μg/L.
10.4.3 instrument tuning working solution. According to the requirements, instrument, take appropriate instrument tuning stock solution with a nitric acid solution (5 + 95) formulated in a suitable concentration tuning solution.
11 instruments and equipment
Note. All glassware and plasticware must be made in the nitric acid solution (1 + 5) Soak overnight, rinse with ultrapure water reserve.
11.1 inductively coupled plasma mass spectrometry (ICP-MS).
11.2 Analytical Balance. a sense of the amount of 0.1mg.
GB 31604.49-2016
12 analysis steps
12.1 Sample Preparation
Depending on the intended use and conditions of use of the sample to be tested, in accordance with the provisions of GB 31604.1 and GB 5009.156 migration test methods and test
Experimental conditions for migration testing. After soaking solution sufficiently mix, take part soak test solution for analysis. If immersion test solution is neutral or alkaline, the
Add the appropriate amount of nitric acid test solution of nitric acid in a concentration of about 5% (volume fraction). While doing the blank test specimen.
12.2 Instrument Reference conditions
12.2.1 use instrument tuning use solution, optimized instrument conditions, working conditions of the instrument reference see A. 1, the reference element analysis mode, see
A. 2.
Note. there is no suitable instrument to eliminate the interference pattern, the interference correction equations requires the use of arsenic, cadmium, lead measurement result is corrected interference correction equations can be found
A. 3.
12.2.2 In the chosen instrument conditions, edit determination, choose the internal standard measured elements and the quality of Element-charge ratio, see reference conditions A. 1
And A. 2.
12.3 standard curve
After the mass spectrometry signal intensity of the blank solution, in order from low to high were measured in mixed standard solution series Mass letter of each element
Signal strength, the standard curve based on the measured elements and its internal standard element mass spectrometry signal intensity ratio and the corresponding concentration of the element.
12.4 Determination of the sample solution
Sample blank solution and the sample solution measured mass signal intensity of each element were measured, calculated from the standard curve for each measured element
Pigment content. If the measured result is outside the range of the standard curve, a corresponding matrix dilute acid solution and then measured.
13 analysis results presentation
The standard curve to obtain the concentration of the analyte in the sample solution for some of deducting the blank value or in accordance with GB 5009.156 migration meter
Operators give migration of food contact materials and articles in some elements. The results to three significant figures.
14 Precision
Two independent determination results under the absolute difference in repeatability condition must not exceed 10% of the arithmetic mean.
Other 15
The detection limit of the elements shown in Table 5.
Table 5 method detection limit of the elements
Element As Cd Cr Ni Pb Sb Zn
The detection limit of/(μg/L) 0.2 0.1 1 0.3 0.3 0.03 0.2
Quantitative limits of these element are shown in Table 6.
GB 31604.49-2016
Table 6 limit of quantification method of each element
Element As Cd Cr Ni Pb Sb Zn
Limit of quantification/(μg/L) 0.6 0.3 3 0.8 0.9 0.1 0.6
Second Inductively Coupled Plasma Atomic Emission Spectrometry
Principle 16
Using food simulants soaked part of food contact materials and articles in contact with food expected, soaking liquid is atomized by a carrier gas into, etc.
Plasma, and high temperatures in an inert argon evaporated atomization, excitation and ionization. Measured element atoms or ions are excited to produce characteristic radiation
Shot in the inductively coupled plasma spectrometer is directly proportional to the concentration of the analyte in the sample solution and line signal strength measured elements with standard series
Quantitative comparison.
17 Reagents and materials
Unless otherwise indicated, the reagents used in this method are excellent pure water as a water GB/T 6682 regulations.
17.1 Reagents
17.1.1 nitric acid (HNO3).
17.1.2 argon (Ar). purity ≥99.99%, or liquid argon.
17.1.3 formulated food simulants required reagents. according to GB 31604.1 requirements.
17.2 reagent preparation
Food simulants. GB 5009.156 formulated in accordance with the provisions.
17.3 Standards
Element standard stock solution (1000mg/L or 100mg/L). arsenic, cadmium, chromium, nickel, lead, antimony and zinc adoption by the National Certification and award criteria
Single-element certificate or substance-element standard stock solution.
17.4 Preparation of standard solutions
Mixed standard working solution. Imbibe right amount of single element standard stock solution or multi-element mixed standard stock solution, with the appropriate food simulant
Serial dilution series dubbed mixed standard solution, the concentration of each element in Table 7. Series of mixed standard solution was transferred to a clean preparation of polyethylene
Ene saved using the bottle.
Note. You can determine the concentration of the standard series solution and range of the element according to the sensitivity of the instrument, the linear range of the sample solution and the actual content of each element. If the
Selected food simulant is neutral or alkaline, add the appropriate amount of nitric acid so that the concentration of nitrate solution is about 5% (volume fraction).
GB 31604.49-2016
Table 7 series of mixed standard solution
Element Standards Series No. concentration/(mg/L) Series 1 Series 2 Series 3 Series 4 Series 5 Series 6
1 As 0 0.0200 0.0400 0.100 0.500 1.00
2 Cd 0 0.00500 0.0100 0.0200 0.0500 0.100
3 Cr 0 0.0200 0.0400 0.100 0.500 1.00
4 Ni 0 0.0200 0.0400 0.100 0.500 1.00
5 Pb 0 0.0200 0.0400 0.100 0.500 1.00
6 Sb 0 0.0200 0.0400 0.100 0.500 1.00
7 Zn 0 0.0200 0.0400 0.100 0.500 1.00
18 instruments and equipment
Note. All glassware and plasticware required with nitric acid (1 + 5) Soak overnight, rinse with ultrapure water reserve.
18.1 inductively coupled plasma atomic emission spectroscopy (ICP-OES).
18.2 Analytical Balance. a sense of the amount of 0.1mg.
19 analysis steps
19.1 Sample Preparation
With 12.1.
19.2 Determination
19.2.1 instrument reference conditions
With A. 4 and A. 5.
19.2.2 standard curve
After measuring the emission intensity of the blank solution, in order from low to high emission light series of mixed standard solution of each element were measured
Spectral intensity, the standard curve according to the intensity of the emission spectrum and the corresponding concentration of the element.
19.2.3 Determination of the sample solution
Blank samples were measured solution and the sample solution is measured emission intensity of each element is calculated from the standard curve for each measured element
Pigment content. If the measured result is outside the range of the standard curve, a corresponding matrix dilute acid solution and then measured.
20 analysis results presentation
The standard curve to obtain the concentration of the analyte in the sample solution in some kind of, after deducting the value of the blank according to GB 5009.156 migration amount calculation,
Get migration from food contact materials and articles of an element. The results to three significant figures.
GB 31604.49-2016
21 Precision
Two independent determination results under the absolute difference in repeatability condition must not exceed 10% of the arithmetic mean.
Other 22
The detection limit of the elements shown in Table 8.
Table 8 method detection limit of the elements
Element As Cd Cr Ni Pb Sb Zn
The detection limit/(mg/L) 0.01 0.001 0.01 0.002 0.01 0.01 0.02
Quantitative limits of these element are shown in Table 9.
Table 9 method limit of quantification of the elements
Element As Cd Cr Ni Pb Sb Zn
The limit of quantification/(mg/L) 0.03 0.003 0.03 0.006 0.03 0.03 0.06
GB 31604.49-2016
Appendix A
Working conditions and various elements of the reference instrument recommended mass to charge ratio or wavelength analysis
A. 1 ICP-MS determination in food contact materials of each element migration reference operating conditions are shown in Table A. 1.
Table A. Reference 1 ICP-MS Operating Conditions
Instrument Instrument Parameter Value Parameter Value
RF power 1500W concentric nebulizer or high-salt type
Plasma gas flow 15L/min sampling cone/Nickel skimmer cone or platinum cone
The carrier gas flow rate 0.80L/min acquisition mode hopping peak (Spectrum)
Auxiliary gas flow 0.40L/min measurement points 1-3
Helium flow rate 4mL/min Automatic Detection
Spray chamber temperature 2 ℃ repetitions 2-3
Note. The different types of equipment according to the actual situation, the above-mentioned instrument parameters and operating conditions are for reference only.
A. 2 ICP-MS determination of various metal elements recommended mass to charge ratio, and the internal standard element analysis model are shown in Table A. 2.
Table A. 2 Recommended analyte mass to charge ratio, and the internal standard element analysis mode
Analysis of the elements As Cd Cr Ni Pb Sb Zn
Mass to charge ratio 75 111 114
Internal standard elements 72Ge/115In 103Rh/115In 45Sc/72Ge 45Sc/72Ge 185Re/209Bi 103Rh/115In 72Ge/103Rh
Analy......
Related standard: GB 31604.10-2016    GB 31604.11-2016
Related PDF sample: GB 31604.30-2016    GB 31604.29-2016