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GB 25554-2010: National food safety standards of food additives polyoxyethylene (20) sorbitan monooleate (Tween 80)
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National food safety standards of food additives polyoxyethylene (20) sorbitan monooleate (Tween 80)
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GB 25554-2010
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Basic data | Standard ID | GB 25554-2010 (GB25554-2010) | | Description (Translated English) | National food safety standards of food additives polyoxyethylene (20) sorbitan monooleate (Tween 80) | | Sector / Industry | National Standard | | Classification of Chinese Standard | X42 | | Classification of International Standard | 67.220.20 | | Word Count Estimation | 8,840 | | Date of Issue | 2010-12-21 | | Date of Implementation | 2011-02-21 | | Regulation (derived from) | Ministry of Health Bulletin No. 19 of 2010 | | Issuing agency(ies) | Ministry of Health of the People's Republic of China | | Summary | This Chinese standard applies to sorbitol monooleate and ethylene oxide as raw materials, by the addition reaction of a food additive polyoxyethylene (20) sorbitan monooleate (Tween 80). | GB 25554-2010: National food safety standards of food additives polyoxyethylene (20) sorbitan monooleate (Tween 80)
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National food safety standards of food additives polyoxyethylene (20) sorbitan monooleate (Tween 80)
National Standards of People's Republic of China
National standards for food safety
Food Additives Polyoxyethylene (20) Sorbitan
Monooleate (Tween 80)
2010-12-21 release
2011-02-21 Implementation
Issued by the Ministry of Health of the People's Republic of China
Foreword
Appendix A of this standard is a normative appendix.
National standards for food safety
Food Additives Polyoxyethylene (20) Sorbitan
Monooleate (Tween 80)
1 Scope
This standard applies to sorbitan monooleate and ethylene oxide as raw materials, the addition reaction of the food additives made of polyoxyethylene
(20) sorbitan monooleate (Tween 80).
2 normative reference documents
The documents cited in this standard are indispensable for the application of this standard. Any reference to the date of the document, only the date of the edition
This applies to this standard. For undated references, the latest edition (including all amendments) applies to this standard.
3 technical requirements
3.1 sensory requirements. should be consistent with the provisions of Table 1.
Table 1 sensory requirements
The project requires a test method
Color at room temperature for the light yellow
Tissue state at room temperature for the oil
Take appropriate laboratory samples, placed in a clean, dry glass tube, in natural light
Line, visual observation
3.2 Physical and chemical indicators. should be consistent with the provisions of Table 2.
Table 2 Physical and chemical indicators
Item Index Test Method
Acid value (in KOH)/(mg/g) ≤ 2.0 Appendix A A.4
Saponification value (in KOH)/(mg/g) 45 ~ 55 Appendix A A.5
Hydroxyl value (in KOH)/(mg/g) 65 ~ 80 Appendix A A.6
Moisture, w /% ≤ 3.0 Appendix A A.7
Residue on ignition, w /% ≤ 0.25 Appendix A A.8
Arsenic (As)/(mg/kg) ≤ 3 Appendix A A.9
Lead (Pb)/(mg/kg) ≤ 2 Appendix A. A.10
Oxyethylene group (calculated as C2H4O), w /% 65.0 to 69.5 GB/T 7385
Appendix A
(Normative appendix)
Testing method
A.1 Warning
Some of the test procedures specified in the test method may result in a hazardous situation. Operators should take appropriate safety and protective measures.
A.2 General provisions
Unless otherwise stated, only the reagents identified as analytical reagents and the tertiary water specified in GB/T 6682-2008 are used in the analysis.
Standard titration solution used in the test method, standard solution for the determination of impurities, preparations and articles, in the absence of other requirements,
GB/T 601, GB/T 602 and GB/T 603.
A.3 Identification test
A.3.1 Reagents and materials
A.3.1.1 Sodium hydroxide solution. 43 g/L.
A.3.1.2 cobalt cobalt thiocyanate solution. 17.4 g of ammonium thiocyanate, 2.8 g of cobalt nitrate, dissolved in water to 100 mL.
A.3.1.3 Hydrochloric acid solution. 23 77.
A.3.2 Analysis steps
A.3.2.1 Take 1 mL of laboratory sample and dissolve in 20 mL of water. Take the solution 10mL, placed in 25mL test tube, add 5mL thiocyanate
Cobalt ammonium solution, mix, add 5mL of chloroform, shaking mixed, after standing, the chloroform layer was blue.
A.3.2.2 Take 1 mL of laboratory sample and dissolve in 20 mL of water. Take the solution 5mL, placed in 25mL test tube, add 5mL of hydroxide
Sodium solution, boil for a few minutes, cooling, acidified with hydrochloric acid solution, milky white turbidity.
A.3.2.3 Take 6mL of laboratory samples, placed in 25mL test tube, add 4mL of water to mix, was jelly.
A.4 Determination of acid value
A.4.1 Methodological Summary
The samples were heated and dissolved in isopropanol and toluene. The titration of titration with sodium hydroxide was carried out with phenolphthalein as the indicator, and the solution was titrated with potassium hydroxide
(KOH), the value is expressed in milligrams per gram (mg/g).
A.4.2 Reagents and materials
A.4.2.1 isopropanol.
A.4.2.2 Toluene.
A.4.2.3 sodium hydroxide standard titration solution. c (NaOH) = 0.1mol/L.
A.4.2.4 phenolphthalein indicator solution. 10g/L.
A.4.3 Analysis steps
Weigh about 5g of laboratory samples, accurate to 0.0001g, placed in a conical flask, add isopropyl alcohol and toluene 40mL, heated to dissolve
solution. Add 5 drops of phenolphthalein indicator solution, titration with sodium hydroxide titration solution to the solution was pink, keep 30s does not fade for the end.
A.4.4 Calculation of results
The acid value w1, expressed in potassium hydroxide (KOH), is expressed in milligrams per gram (mg/g) and is calculated according to formula (A.1)
w1 = V1cMm1
(A.1)
Where.
V1 --- sodium hydroxide standard titration solution (A.4.2.3) volume of the value in milliliters (mL);
c - the exact value of sodium hydroxide standard titration solution concentration in moles per liter (mol/L);
m1 --- the mass of the sample, in grams (g);
M - the molar mass of potassium hydroxide in grams per mole (g/mol) [M = 56.109].
The arithmetic mean of the results of two parallel measurements is the result of the report. The absolute difference between the two parallel determinations is not greater than 0.2 mg/g.
A.5 Determination of saponification value
A.5.1 Reagents and materials
A.5.1.1 anhydrous ethanol.
A.5.1.2 Potassium hydroxide solution. 40 g/L.
A.5.1.3 Standard titration solution for hydrochloric acid. c (HCl) = 0.5 mol/L.
A.5.1.4 phenolphthalein indicator solution. 10g/L.
A.5.2 Analysis steps
Approximately 2.5 g of laboratory samples were weighed to 0.0001 g, placed in a 250 mL Erlenmeyer flask, (25 ± 0.02) mL of hydrogen
Potassium ethanol solution, connected to the condenser, placed in a water bath heated reflux 1h, slightly cold with 10mL anhydrous ethanol leaching condenser, remove the cone
Bottle, add 5 drops of phenolphthalein indicator solution, titrated with hydrochloric acid standard titration solution to the red just disappeared, heating the test solution to boiling. If there is powder
Red, continue to titration to the red disappearance is the end point.
At the same time as the measurement, the same amount of the reagent solution was used as a blank test in the same manner as in the measurement.
A.5.3 Calculation of results
The saponification value w2, expressed as potassium hydroxide (KOH), is expressed in milligrams per gram (mg/g), calculated according to formula (A.2)
w2 =
(V0-V2) cM
m2
(A.2)
Where.
V2 --- sample consumption of hydrochloric acid standard titration solution (A.5.1.3) volume of the value in milliliters (mL);
V0 --- blank test consumption of hydrochloric acid standard titration solution (A.5.1.3) volume of the value in milliliters (mL);
c - the exact value of the standard titration solution for hydrochloric acid, in moles per liter (mol/L);
m2 --- the mass of the sample, in grams (g);
M - the molar mass of potassium hydroxide in grams per mole (g/mol) [M = 56.109].
The arithmetic mean of the results of two parallel measurements is the result of the report. The absolute difference between the two parallel determinations is not greater than 1 mg/g.
A.6 Determination of hydroxyl value
A.6.1 Reagents and materials
A.6.1.1 pyridine. phenolphthalein as indicator, with c (HCl) = 0.1mol/L hydrochloric acid solution and.
A.6.1.2 n-butanol. phenol phenol as the indicator, with potassium hydroxide ethanol standard titration solution and.
A.6.1.3 Acetylating agent. Acetic anhydride and pyridine were mixed in 1 3 and stored in a brown bottle.
A.6.1.4 Potassium hydroxide ethanol standard titration solution. c (KOH) = 0.5mol/L.
A.6.1.5 phenolphthalein indicator solution. 10g/L.
A.6.2 Analysis steps
Approximately 2.2 g of laboratory samples were weighed to 0.0001 g, placed in a 250 mL Erlenmeyer flask, (5 ± 0.02) mL of acetyl
Chemical agent, connected to the condenser, placed in a water bath heated to reflux 1h. Add 10 mL of water from the top of the condenser to the conical flask and continue heating
After 10 min, cool to room temperature. Rinse the condenser with 15 mL of n-butanol, remove the condenser, and rinse the wall with 10 mL of n-butanol. plus
Into the 8 drops of phenolphthalein indicator solution, titration with potassium hydroxide ethanol titration solution to the solution was pink is the end point.
At the same time as the measurement, the same amount of the reagent solution was used as a blank test in the same manner as in the measurement.
To calibrate the free acid, weigh about 10g of laboratory samples, accurate to 0.01g. Placed in a conical flask, add 30 mL of pyridine, add
5 drops of phenolphthalein indicator solution, titration with potassium hydroxide ethanol titration solution to the solution was pink.
A.6.3 Calculation of results
Hydroxyl value of w3, potassium hydroxide (KOH), the value in milligrams per gram (mg/g), according to formula (A.3).
w3 =
(V0-V3) cM
m3
V4cM
m0
(A.3)
Where.
V3 --- sample consumption of potassium hydroxide ethanol standard titration solution (A.6.1.4) volume of the value in milliliters (mL);
V0 --- blank test consumption of potassium hydroxide ethanol standard titration solution (A.6.1.4) volume of the value in milliliters (mL);
V4 --- corrected free acid consumption of potassium hydroxide ethanol standard titration solution (A.6.1.4) volume of the value in milliliters (mL);
c - potassium hydroxide ethanol standard titration solution concentration of the exact value in moles per liter (mol/L);
m3 --- value of the value of the test value of the value of gold, the unit is grams (g);
m0 --- corrected free acid determination of the quality of the sample value, the unit is grams (g);
M - the molar mass of potassium hydroxide in grams per mole (g/mol) [M = 56.109].
The arithmetic mean of the results of two parallel measurements is the result of the report. The absolute difference between the two parallel determinations is not more than 2 mg/g.
A.7 Determination of Moisture
Weigh about 0.6g of laboratory samples, accurate to 0.0002g. Placed in a 25mL beaker, add a small amount of chloroform, dissolved and heated to turn
Transferred to a 25mL volumetric flask, rinse the beaker several times with chloroform and transfer it to the volumetric flask and dilute it to the mark. Measure (5 ± 0.02) mL
Sample solution, according to GB/T 6283 direct charge method.
The arithmetic mean of the results of two parallel measurements is the result of the report. The absolute difference between the two parallel determinations is not more than 0.05%.
A.8 Determination of burning residue
According to GB/T 7531. The firing temperature is (850 ± 25) ° C.
A.9 Determination of arsenic
According to GB/T 5009.76 arsenic spot method. (10 ± 0.02) mL sample solution (phase) was measured by "wet digestion"
When in 1.0g laboratory samples). Preparation of limited standard solution. Removal with (3 ± 0.02) mL of arsenic (As) standard solution (equivalent to
3 μgAs), the same treatment with the sample at the same time.
A.10 Determination of lead
A.10.1 Colorimetric method (Arbitration law)
According to GB/T 5009.75. Sample treatment. Weigh about 2.5g of laboratory samples, accurate to 0.0001g, placed in 50mL crucible
In the crucible, carbonized at a low temperature and then ashed at 500 ° C to 550 ° C. After cooling, 5 mL of nitric acid solution (1 1) was added and stirred to dissolve
Solution, add 10mL of water transferred to the 25mL volumetric flask, diluted with water to the mark, shake.
A.10.2 Atomic Absorption Spectrometry
According to GB 5009.12. According to GB/T 5009.75 "dry digestion" treatment samples. When using graphite furnace atomic absorption spectrometry,
Depending on the sample, the sample solution is properly diluted.
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