GB 1886.183-2016 PDF in English
GB 1886.183-2016 (GB1886.183-2016) PDF English
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Food additive -- Benzoic acid
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Standards related to (historical): GB 1886.183-2016
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GB 1886.183-2016: PDF in English GB 1886.183-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard –
Food Additive – Benzoic Acid
食品添加剂 苯甲酸
ISSUED ON. AUGUST 31, 2016
IMPLEMENTED ON. JANUARY 1, 2017
Issued by. National Health and Family Planning Commission of the
People’s Republic of China
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Table of Contents
Foreword ... 3
1 Application Scope ... 4
2 Structural Formula, Molecular Formula and Relative Molecular Mass ... 4
3 Technical Requirements ... 4
Annex A Test Methods ... 6
Foreword
This Standard replaces GB 1901-2005, Food Additive – Benzoic Acid.
Compared with GB 1901-2005, the major changes of this Standard are as follows.
-- it changes the standard name into “National Food Safety Standard – Food
Additive – Benzoic Acid”;
-- it deletes the item of arsenic;
-- it adds the items of phthalic acid and biphenyls and test methods;
-- it adds the test method for heavy metals.
National Food Safety Standard –
Food Additive – Benzoic Acid
1 Application Scope
This Standard applies to food additive benzoic acid which is made from petroleum
toluene through catalytic oxidation and refinement.
2 Structural Formula, Molecular Formula and Relative
Molecular Mass
2.1 Structural formula
2.2 Molecular formula
C7H6O2
2.3 Relative molecular mass
122.12 (in accordance with International Standard Relative Atomic Masses 2011)
3 Technical Requirements
3.1 Sensory requirements
Sensory requirements shall be as specified in Table 1.
Table 1 -- Sensory Requirements
Item Requirement Test method
Colour White Take an appropriate amount of specimen to place on a
clean, dry white porcelain dish; observe its colour and
state under natural light; smell its odour
State Crystal or crystalline powder
Odour Slight benzaldehyde odour
The readily oxidizable substances in specimen react with potassium permanganate; it
is the end of reaction when the solution appears the pink colour of potassium
permanganate after they react completely. The volume of potassium permanganate
standard titration solution consumed is used to control the quantity of oxidizable
substances.
A.4.2 Reagents and materials
A.4.2.1 Sulphuric acid
A.4.2.2 Potassium permanganate standard titration solution. c(ଵହKMnO4) = 0.1 mol/L.
A.4.3 Analytical procedure
Weigh 1.0 g of specimen, accurate to 0.001 g. Add 1.5 mL of sulphuric acid to 100 mL
of water; add dropwise potassium permanganate standard titration solution until pink
while boiling; maintain for 30 s without colour fading; add weighed specimen while hot;
use potassium permanganate standard titration solution to titrate until pink while the
solution is about 70°C; maintain for 15 s without colour fading. The potassium
permanganate standard titration solution consumed shall not be more than 0.5 mL.
A.5 Readily carbonizable substance test
A.5.1 Method summary
Sulphuric acid makes the readily carbonizable substances in specimen dehydrated
and carbonized and makes the test solution appear colour. Compare the colour with
that of standard colorimetric solution; control the quantity of readily carbonizable
substances.
A.5.2 Reagents and materials
A.5.2.1 Sulphuric acid. guaranteed reagent.
A.5.2.2 Q standard colour. prepared and standardized in accordance with the
method specified in GB/T 9737.
A.5.3 Analytical procedure
Weigh 0.50 g of specimen, accurate to 0.001 g; place in a 10 mL colorimetric tube; add
5 mL of sulphuric acid; mix up to make the specimen fully dissolve. The colour of the
solution shall not be darker than Q standard colour.
A.6 Determination of heavy metals (based on Pb)
A.6.1 Reagents and materials
A.6.1.1 Ethyl alcohol solution. 95%.
Take the arithmetic mean value of the results obtained from two parallel tests as
reported result. The absolute difference between the results of two parallel tests shall
not be greater than 0.04%.
A.9 Determination of ignition residue
A.9.1 Reagents and materials
Sulphuric acid (≥ 95%).
A.9.2 Analytical procedure
Weigh about 2 g of specimen, accurate to 0.000 1 g; place into a porcelain crucible
dried to constant weight; add sulphuric acid for moistening; ignite slowly to make
specimen carbonized; cool and add more sulphuric acid for moistening; heat slowly
until sulphuric acid vapour is hardly generated; ignite for 2 h at 800°C; place in a
desiccator to cool to room temperature; weigh.
A.9.3 Calculation of results
The mass fraction w3 of ignition residue is calculated in accordance with Formula (A.3).
where,
m2—mass of residue after ignition, in g;
m1—mass of specimen, in g.
Take the arithmetic mean value of the results obtained from two parallel tests as the
reported result. The absolute difference between the results of two parallel tests shall
not be greater than 20% of the arithmetic mean value of the two values.
A.10 Determination of phthalic acid
A.10.1 Method summary
Dissolve specimen into the mixed solution of methyl alcohol and acetic acid solution;
use phthalic acid as external standard and use liquid chromatography to determine the
content of phthalic acid in benzoic acid.
A.10.2 Reagents and materials
A.10.2.1 Methyl alcohol.
A.10.2.2 Acetic acid solution. 1 → 100.
A.10.2.3 Mixed solution of methyl alcohol-acetic acid solution. 2 + 3.
cST—concentration of phthalic acid standard solution, in μg/mL;
AS—peak area of specimen test solution;
V—volume of specimen test solution, in mL;
AST—peak area of phthalic acid standard solution;
m—mass of specimen, in g.
Take the arithmetic mean value of the results obtained from two parallel tests as the
reported result. The absolute difference between the results of two parallel tests shall
not be greater than 20% of the arithmetic mean value of the two values.
A.11 Determination of biphenyls
A.11.1 Method summary
Dissolve specimen into N,N-dimethyl formamide; use propyl benzoate as internal
standard substance and use quantitative determination for the total content of 5
biphenyl impurities. biphenyl, 2-methyl biphenyl, 3-methyl biphenyl, 4-methyl biphenyl
and benzyl benzoate.
A.11.2 Reagents and materials
A.11.2.1 N,N-dimethyl formamide (DMF).
A.11.2.2 Mixed standard working solution. take separately 20 mg of propyl formate
(NPB), biphenyl (BP), 2-methyl biphenyl (2MBP), 3-methyl biphenyl (3MBP), 4-methyl
biphenyl (4MBP) and benzyl benzoate (BB), accurate to 0.1 mg; place into a 50 mL
volumetric flask; use DMF to dissolve; add 10.0 g of benzoic acid; add dropwise DMF
to dissolve to scale.
A.11.2.3 Propyl formate (NPB) internal standard solution (10 mg/mL). weigh 250 mg
of NPB; place into a 25 mL volumetric flask; add dropwise DMF to dissolve to scale.
A.11.3 Apparatus
Gas chromatograph. equipped with hydrogen flame ionization detector (FID).
A.11.4 Chromatographic column and operating conditions
See Table A.2 for the chromatographic column and operating conditions recommended
by this Standard. The chromatographic column and operating conditions which are
capable of achieving equal degree of separation may also be used.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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