GB 31604.2-2016Food safety national standard -- Food contact materials and products -- Determination of potassium permanganate consumption (English PDF)

Foreword

This Standard replaced the determination of potassium permanganate consumption

stipulated in the following standards, such as GB/T 5009.60-2003 Method for Analysis

of Hygienic Standard of Products of Polyethylene, Polystyrene and Polypropyrene for

Food Packaging, GB/T 5009.61-2003 Method for Analysis of Hygienic Standard of

Products of Tripolycyanamide for Food Packaging, GB/T 5009.64-2003 Method for

Analysis of Hygienic Standard of Rubber Sheet (Ring) for Food Use, GB/T 5009.65-

2003 Method for Analysis of Hygienic Standard of Rubber Sealing Ring for Pressure

Cooker for Food Use, GB/T 5009.66-2003 Method for Analysis of Hygienic Standard

of Nipple of a Feeding Bottle, GB/T 5009.67-2003 Method for Analysis of Hygienic

Standard of Product of Polyvinyl Chloride for Food Packaging, GB/T 5009.68-2003

Method for Analysis of Hygienic Standard of Perchlorovinyl-Coating for Inner Wall of

Food Container, GB/T 5009.69-2003 Method for Analysis of Hygienic Standard of

Epoxy Phenolic Coatings for Inner Wall of Food Cans, GB/T 5009.70-2003 Method for

Analysis of Hygienic Standard of Epoxy Coating For Inner Wall of Food Container,

GB/T 5009.79-2003 Hygienic Analytical Method of Rubber Hose for Food Use, GB/T

5009.80-2003 Method for Analysis of Hygienic Standard of Polytetrafluorethylene

Coating for Inner Wall of Food Cotainer, GB/T 5009.98-2003 Method for Analysis of

Hygienic Standard of Unsaturated Polyester Resin and Glass Fibre Reinforced

Products, GB/T 5009.99-2003 Method for Analysis of Hygienic Standard of

Polycarbonate Resin Used as Food Containers and Packaging, GB/T 5009.100-2003

Method for Analysis of Hygienic Standard of Products of Foamed Polystyrene for Food

Packaging.

Compared with GB/T 5009.60-2003, GB/T 5009.61-2003, GB/T 5009.64-2003, GB/T

5009.65-2003, GB/T 5009.66-2003, GB/T 5009.67-2003, GB/T 5009.68-2003, GB/T

5009.69-2003, GB/T 5009.70-2003, GB/T 5009.79-2003, GB/T 5009.80-2003, GB/T

5009.98-2003, GB/T 5009.99-2003, and GB/T 5009.100-2003, this Standard has the

major changes as follows.

--- Modified the standard name into "National Food Safety Standard on

Determination of Potassium Permanganate Consumption in Food Contact

Materials and Products";

--- Modified the standard scope;

--- Modified the calculation formula and unit.

National Food Safety Standard –

Food Contact Materials and Products –

Determination of potassium permanganate consumption

1 Scope

This Standard specifies the determination method of potassium permanganate

consumption in food contact materials and products.

This Standard is applicable to the determination of potassium permanganate

consumption in food contact materials and products.

2 Principle

Under acidic condition, use standard potassium permanganate solution to titrate the

sample soaking solution; calculate the potassium permanganate consumption in the

sample according to the volume of titration solution consumed by the sample.

3 Reagents and Materials

Unless otherwise is specified, all reagents used in this method shall be analytically

pure, while the water used shall be Class-II water stipulated in GB/T 6682.

4 Analytical Procedures

5 Expression of Analytical Results

6 Precision

The absolute difference between the two independent determination results obtained

under the repeated conditions shall not exceed 20% arithmetic mean.

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