1 Scope
This standard specifies graphite furnace atomic absorption spectrometry, inductively coupled plasma mass spectrometry, inductively coupled plasma emission spectrometry method and 1, 5-diphenylcarbohydrazide colorimetry for the determination of migration of chromium in food contact materials and articles after being soaked in food simulants.
This standard is applicable to determination of migration of chromium in food contact materials and articles.
Method I Graphite Furnace Atomic Absorption Spectrometry
2 Principle
Soak the parts of the food contact materials and articles which are expected to contact with food, atomize the soak solution through the graphite furnace; within certain concentration range, the absorption value determined at 357.9 nm is in direct proportion to the chromium content and is compared with standard series for quantification.
3 Reagents and Materials
Unless otherwise specified, guaranteed reagents and Class-II water (defined in GB/T 6682) are adopted for the purpose of this method.
3.1 Reagents
3.1.1 Nitric acid (HNO3).
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Analysis Steps
6 Expression of Analysis Results
7 Accuracy
8 Other
9 Principle
10 Reagents and Materials
11 Instruments and Apparatus
12 Analysis Steps
13 Expression of Analysis Results
14 Accuracy
15 Other
Annex A
Standard
GB 31604.25-2016 National Food Safety Standard - Food Contact Materials and Articles - Determination of Migration of Chromium (English Version)
Standard No.
GB 31604.25-2016
Status
superseded
Language
English
File Format
PDF
Word Count
3000 words
Price(USD)
60.0
Implemented on
2017-3-1
Delivery
via email in 1 business day
Detail of GB 31604.25-2016
Standard No.
GB 31604.25-2016
English Name
National Food Safety Standard - Food Contact Materials and Articles - Determination of Migration of Chromium
1 Scope
This standard specifies graphite furnace atomic absorption spectrometry, inductively coupled plasma mass spectrometry, inductively coupled plasma emission spectrometry method and 1, 5-diphenylcarbohydrazide colorimetry for the determination of migration of chromium in food contact materials and articles after being soaked in food simulants.
This standard is applicable to determination of migration of chromium in food contact materials and articles.
Method I Graphite Furnace Atomic Absorption Spectrometry
2 Principle
Soak the parts of the food contact materials and articles which are expected to contact with food, atomize the soak solution through the graphite furnace; within certain concentration range, the absorption value determined at 357.9 nm is in direct proportion to the chromium content and is compared with standard series for quantification.
3 Reagents and Materials
Unless otherwise specified, guaranteed reagents and Class-II water (defined in GB/T 6682) are adopted for the purpose of this method.
3.1 Reagents
3.1.1 Nitric acid (HNO3).
Contents of GB 31604.25-2016
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Analysis Steps
6 Expression of Analysis Results
7 Accuracy
8 Other
9 Principle
10 Reagents and Materials
11 Instruments and Apparatus
12 Analysis Steps
13 Expression of Analysis Results
14 Accuracy
15 Other
Annex A