|
US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 31576-2015: Animal and vegetable fats and oils -- Determination of copper, iron and nickel contents -- Graphite furnace atomic absorption method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 31576-2015 | English | 189 |
Add to Cart
|
3 days [Need to translate]
|
Animal and vegetable fats and oils -- Determination of copper, iron and nickel contents -- Graphite furnace atomic absorption method
| Valid |
GB/T 31576-2015
|
PDF similar to GB/T 31576-2015
Basic data | Standard ID | GB/T 31576-2015 (GB/T31576-2015) | | Description (Translated English) | Animal and vegetable fats and oils -- Determination of copper, iron and nickel contents -- Graphite furnace atomic absorption method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X14 | | Classification of International Standard | 67.200.10 | | Word Count Estimation | 9,954 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2015-11-28 | | Quoted Standard | GB/T 6682; GB/T 15687 | | Adopted Standard | ISO 8294-1994, MOD | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard applies to unrefined and refined edible oils and fats trace copper, iron and nickel determination. | GB/T 31576-2015: Animal and vegetable fats and oils -- Determination of copper, iron and nickel contents -- Graphite furnace atomic absorption method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Animal and vegetable fats and oils. Determination of copper, iron and nickel contents. Graphite furnace atomic absorption method
ICS 67.200.10
X14
National Standards of People's Republic of China
Animal and vegetable fats Determination of copper, iron and nickel
Graphite Furnace Atomic Absorption Spectrometry
Determinationofcopper, ironandnickelcontents-
(ISO 8294.1994, MOD)
Issued on. 2015-05-15
2015-11-28 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This revised standard adopts ISO 8294.1994 "Animal and vegetable fats Determination of copper, iron and nickel graphite furnace atomic absorption method" (in English).
The main technical content of this standard and ISO 8294.1994 is consistent, but made the following modifications.
--- On normative references, this standard has been adjusted technical differences are reflected in Chapter 2, "normative references"
The specific adjustments are as follows.
● equivalents adoption of international standards GB/T 6682, instead of the ISO 3696;
● equivalents adoption of international standards GB/T 15687, instead of ISO 661.
--- Increased niobium chloride can also be used as a niobium solution formulation (see 4.5).
--- Reorganize the structure and content of Chapter 11.
The standard proposed by the National Food Authority.
This standard by the National Grain and Oil Standardization Technical Committee (SAC/TC270) centralized.
This standard was drafted. Academy of State Administration of Grain, Grain and Oil Textile Import and Export Co., Nanjing University of Finance and Economics, Hebei Province, grain and oil quality
The amount of the test center.
Drafters of this standard. Xue Yalin, OILS, Zhang Xi, Murong Zheng, Zhang Yan, Zhou Minghui, Yuan Jian, Zhang Dong, Ma Rong, Pei Ruili.
Animal and vegetable fats Determination of copper, iron and nickel
Graphite Furnace Atomic Absorption Spectrometry
1 Scope
This standard applies to unrefined and refined edible oils trace copper, iron and nickel in.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696.1995, IDT)
GB/T 15687 animal and plant oils prepared sample (GB/T 15687-2008, ISO 661.2003, IDT)
Principle 3
Fats pretreated, take appropriate graphite furnace atomizer in atomized measured at selected instrument parameters and settings optimal wavelength
Absorbance in the corresponding standard solution of an organic compound of a metal element calibration, calculate the content of metal elements in the oil.
4 Reagents
Unless otherwise indicated, the reagents used were of analytical grade standard. Water should be consistent with GB/T 6682 stipulated two of water.
4.1 Alumina. AR.
Note 1. The recommended use by Merck (D-1600Darmstadt, Germany) alumina (QualityNo.1077).
4.2 Dilution oil. liquid form at ambient temperature in edible oil refining, stored in polyethylene or polypropylene bottles containing no metal component
(5.1). Oil, copper content should be less than 3μg/kg; iron content should be less than 5μg/kg; the nickel content should be less than 5μg/kg.
Note 2. The diluted oil can be prepared according to the following steps. Press 1kg 3L oil plus petroleum ether (boiling range 40 ℃ ~ 60 ℃) the proportion of the oil was dissolved in petroleum ether. use
To the oil was purified twice by mass of alumina (activated at 150 ℃ 14h) preparing an alumina column (diameter. height = 1.10). The oil solution on
Column, and the equivalent of dissolving grease with petroleum ether 5/3 times the volume of petroleum ether as eluent. In a nitrogen stream (2L/min ~ 5L/min) under the protection of ships
Distilled eluent petroleum ether on a hot water bath, the last remaining small amount of petroleum ether to vacuum distillation divisible.
4.3 standard stock solution. Dilute the standard preparation of organometallic material into standard stock solution was diluted oil (4.2), the metal element content of
It is. Cu was 2mg/kg; Fe of 10mg/kg; Ni of 10mg/kg.
Note 3. The reference material available on Continental Oil Company (Poncacity, Oklahoma, United States) (5000mg/kg) or Merck (D-1600Darmstardt, Germany
State (1000mg/kg).
4.4 standard solution. diluted oil (4.2) standard stock solution (4.3) formulated in a standard working solution. When we use the existing service. Standard Operating
Concentration as follows.
Cu --- 0.05mg/kg, 0.1mg/kg and 0.2mg/kg;
Fe --- 0.25mg/kg, 0.5mg/kg and 1.0mg/kg;
Ni --- 0.25mg/kg, 0.5mg/kg and 1.0mg/kg.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 31576-2015_English be delivered?Answer: Upon your order, we will start to translate GB/T 31576-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of GB/T 31576-2015_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 31576-2015_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|