GB 31604.11-2016 PDF in English
GB 31604.11-2016 (GB31604.11-2016) PDF English
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Food contact materials -- Polymer -- Determination of 1 3-benzenedimethanamine in food simulants -- High performance liquid chromatography
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Standards related to (historical): GB 31604.11-2016
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GB 31604.11-2016: PDF in English GB 31604.11-2016
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
National Food Safety Standard - Food Contact
Materials and Articles - Determination of Migration of
1,3-benzenedimethanamine
ISSUED ON. OCTOBER 19, 2016
IMPLEMENTED ON. APRIL 19, 2017
Issued by. National Health and Family Planning Commission of the
People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Principle... 4
3 Reagents and materials ... 4
4 Instruments and equipment ... 7
5 Analysis steps ... 8
6 Expression of analysis results ... 9
7 Precision... 10
8 Other ... 10
Annex A Liquid chromatogram ... 11
Foreword
This Standard replaces GB/T 23296.25-2009 Food contact materials - Polymer
- Determination of 1 3-benzenedimethanamine in food simulants - High
performance liquid chromatography and SN/T 2550-2010 Food contact
materials. Polymer materials. Determination of 1,3-benzenedimethanamine in
food simulants.
Compared with GB/T 23296.25-2009, the main change in this Standard is as
follow.
- modified the standard’s name to “National Food Safety Standard - Food
Contact Materials and Articles - Determination of Migration of 1,3-
benzenedimethanamine”.
National Food Safety Standard - Food Contact
Materials and Articles - Determination of Migration of
1,3-benzenedimethanamine
1 Scope
This Standard specifies the high-performance liquid chromatography method
for determination of migration of 1,3-benzenedimethanamine.
This Standard is applicable to the determination of migration of 1,3-
benzenedimethanamine in food contact materials and articles.
2 Principle
After the migration test of food contact materials, 1,3-benzenedimethylamine in
water-based, acidic and alcohol food simulants shall be subjected to fluorescent
amine derivatization, then separation by high performance liquid
chromatography. Using fluorescence detector detection, external standard
method to quantify.
3 Reagents and materials
Unless otherwise specified, the reagents used in this method are of analytical
grade, water is of grade one specified in GB/T 6682 and saturated with nitrogen.
3.1 Reagents
3.1.1 Water-based, acidic, alcohol-based, oil-based food simulants. reagents
used in accordance with the provisions of GB 31604.1
3.1.2 Methanol (CH4O, CAS No.. 67-56-1). chromatographic pure
3.1.3 Tetrahydrofuran (C4H8O, CAS No. 109-99-9). chromatographic pure
3.1.4 Acetone (C3H6O, CAS No. 67-64-1)
3.1.5 Heptane (C7H16, CAS No.. 142-82-5)
3.1.6 Acetic acid (C2H4O2, CAS No.. 64-19-7)
Weigh 50 mg (nearest to 0.0001 g) of 1,3-benzenedimethylamine. Dissolve with
water. Set volume to 50 mL. The concentration shall be 1000 mg/L. This
solution shall be stored in the darkness at 5°C for three months.
3.4.2 1,3-benzenedimethylamine standard working solution used for
water-based (acidic, alcoholic) food simulants
Pipette 0.20 mL of 1,3-benzenedimethanamine standard stock solution (3.4.1)
in a 100mL volumetric flask with a graduated pipette. Dilute to scale with a
water-based (acidic, alcoholic) food simulant to obtain a 1,3-
benzenedimethanamine standard working solution for water-based (acidic,
alcoholic) food simulants with a concentration of 2.0 mg/L. This solution shall
be stored in the darkness at 5°C for one month.
3.4.3 1,3-benzenedimethylamine standard working solution used for oil-
based simulants
Pipette 2.0 mL of 1,3-xylylenediamine standard stock solution (3.4.1) in a 100
mL volumetric flask with a graduated pipette. Dilute to scale with water to obtain
a solution with a concentration of 20.0 mg/L. Pipette 10 mL of this solution in a
100 mL volumetric flask. Dilute to scale with tetrahydrofuran solution (3.2.2) to
obtain 1,3-benzenedimethylamine standard working solution for oil-based
simulants with a concentration of 2.0 mg/L. This solution shall be stored in the
darkness at 5°C for one month.
3.4.4 1,3-benzenedimethylamine standard working solution of water-
based (alcoholic) food simulants
Respectively using a graduated pipette to pipette 0.5 mL, 2.0 mL, 3.0 mL, 4.0
mL, 5.0 mL of 1,3-benzenedimethylamine standard working solution (3.4.2) in
five 100 mL volumetric flasks. Use corresponding food simulants (water-based,
alcohol food simulants) to set volume to scale and obtain standard working
solutions with concentrations of 0.010 mg/L, 0.040 mg/L, 0.060 mg/L, 0.080
mg/L, 0.10 mg/L. Pipette 2.0 mL of the above solution into 5 5-mL tubes with a
graduated pipette. Separately add 0.4 mL of boric acid buffer solution (3.2.5),
mix well. Add 300 μL of fluorescein solution (3.2.3) derivatization reagent
separately, oscillating 1min, placing still 10min. The derivative solution is filtered
through a 0.45 μm filter for high performance liquid chromatography injection.
3.4.5 1,3-benzenedimethylamine standard working solution of acidic
food simulants
Respectively using a graduated pipette to pipette 0.5 mL, 2.0 mL, 3.0 mL, 4.0
mL, 5.0 mL of 1,3-benzenedimethylamine standard working solution (3.4.2) in
acidic food simulants into five 100 mL volumetric flasks. Use acidic food
simulants to set volume to scale to obtain standard working solutions with
concentrations of 0.010 mg/L, 0.040 mg/L, 0.060 mg/L, 0.080 mg/L, 0.10 mg/L.
5 Analysis steps
5.1 Sample migration test
In accordance with the requirements of GB 5009.156 and GB 31604.1, carry
out the sample migration test so as to obtain food simulant test solution. If the
resulting food simulant test solution cannot be immediately used for the next
test, the food simulant test solution shall be stored in a 4°C refrigerator from
light.
The resulting food simulant test solution shall be cooled or returned to room
temperature before proceeding to the next test.
5.2 Preparation of test solution
5.2.1 Preparations of water-based and alcohol food simulants
Pipette 2.0 mL of a water-based (alcoholic) food simulant obtained from the
migration test in a 5-mL tube with a graduated pipette. Add 0.4 mL of borate
buffer, mixing well. Then add 300 μL of fluorescent amine solution derivatization
reagent, oscillating 1min, placing still 10min. The derivative solution is filtered
through a 0.45 μm filter for high performance liquid chromatography injection.
5.2.2 Preparation of acidic food simulants
Pipette 10.0 mL of acidic food simulants from the migration test in a 25-mL
beaker by using a graduated pipette. Drop 5 mol/L sodium hydroxide solution
(3.2.4) with same volume as sodium hydroxide solution in 3.4.5, well mixing
(solution pH shall be within 8.0~9.9). Pipette 2.0 mL of the above solution in a
5-mL tube with a graduated pipette. The rest shall follow “add 0.4 mL of borate
buffer.for high performance liquid chromatography injection” in 5.2.1.
5.2.3 Preparation of oil-based food simulants
Weigh 20.0g (nearest to 0.01 g) olive oil mimics placing in a 125-mL separating
funnel. Separately add 1 mL of tetrahydrofuran solution and 5.0 mL of heptane.
After thoroughly mixing, add 20 mL of acetic acid solution, oscillating 5min,
placing still 15min. After the two phases are completely separated, collect the
aqueous phase. Pipette 10.0 mL of the above solution in a 25-mL beaker by
using a graduated pipette. Drop 5 mol/L sodium hydroxide solution (3.2.4) with
same volume as sodium hydroxide solution in 3.4.6, well mixing (solution pH
shall be within 8.0~9.9). Pipette 2.0 mL of the above solution in a 5-mL tube
with a graduated pipette. The rest shall follow “add 0.4 mL of borate buffer.for
high performance liquid chromatography injection” in 5.2.1.
5.3 Preparation of blank solution
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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