1 Scope
This standard specifies the determination method of heavy metals in food simulants (4% acetic acid).
Method I of this standard is applicable to the determination of heavy metals in food simulants (4% acetic acid) of food contact materials and articles.
Method II of this standard is applicable to the determination of heavy metals in food simulants (4% acetic acid) of food contact rubbers.
Method I Direct Colorimetry
2 Theory
React the heavy metal (calculated by lead) in test solution of food simulant obtained from migration test with sodium sulfide, form the yellowish-brown sulfide in acid solution, then compare its color with the color of lead standard solution.
3 Reagents and Materials
Note: unless otherwise specified, all reactants adopted for this method are analytically pure and water is Grade 2 water as specified in GB/T 6682.
3.1 Reactants
3.1.1 Sodium sulfide 9-hydrate (Na2S·9H2O).
3.1.2 Glycerol (C3H8O3).
3.1.3 Glacial acetic acid (CH3COOH).
3.1.4 Nitric acid (HNO3 with mass fraction of 60%).
3.2 Preparation of reagents
3.2.1 Nitric acid solution (with mass fraction of 10%): pipet 16.7mL of nitric acid (3.1.4) and dilute with water to 100mL.
Foreword I
1 Scope
2 Theory
3 Reagents and Materials
4 Apparatuses
5 Analytical Procedures
6 Expression of Analysis Results
7 Theory
8 Reagents and Materials
9 Apparatuses
10 Analytical Procedures
11 Expression of Analysis Results
Standard
GB 31604.9-2016 National Food Safety Standard -Food Contact Materials and Articles - Determination of Heavy Metals in Food Simulants (English Version)
Standard No.
GB 31604.9-2016
Status
valid
Language
English
File Format
PDF
Word Count
2000 words
Price(USD)
60.0
Implemented on
2016-9-20
Delivery
via email in 1 business day
Detail of GB 31604.9-2016
Standard No.
GB 31604.9-2016
English Name
National Food Safety Standard -Food Contact Materials and Articles - Determination of Heavy Metals in Food Simulants
1 Scope
This standard specifies the determination method of heavy metals in food simulants (4% acetic acid).
Method I of this standard is applicable to the determination of heavy metals in food simulants (4% acetic acid) of food contact materials and articles.
Method II of this standard is applicable to the determination of heavy metals in food simulants (4% acetic acid) of food contact rubbers.
Method I Direct Colorimetry
2 Theory
React the heavy metal (calculated by lead) in test solution of food simulant obtained from migration test with sodium sulfide, form the yellowish-brown sulfide in acid solution, then compare its color with the color of lead standard solution.
3 Reagents and Materials
Note: unless otherwise specified, all reactants adopted for this method are analytically pure and water is Grade 2 water as specified in GB/T 6682.
3.1 Reactants
3.1.1 Sodium sulfide 9-hydrate (Na2S·9H2O).
3.1.2 Glycerol (C3H8O3).
3.1.3 Glacial acetic acid (CH3COOH).
3.1.4 Nitric acid (HNO3 with mass fraction of 60%).
3.2 Preparation of reagents
3.2.1 Nitric acid solution (with mass fraction of 10%): pipet 16.7mL of nitric acid (3.1.4) and dilute with water to 100mL.
Contents of GB 31604.9-2016
Foreword I
1 Scope
2 Theory
3 Reagents and Materials
4 Apparatuses
5 Analytical Procedures
6 Expression of Analysis Results
7 Theory
8 Reagents and Materials
9 Apparatuses
10 Analytical Procedures
11 Expression of Analysis Results