GB/T 30799-2014 in English

《GB/T 30799-2014食品用洗涤剂试验方法 重金属的测定》由TC395（全国食品用洗涤消毒产品标准化技术委员会）归口，主管部门为中国轻工业联合会。
本标准规定了测定食品用洗涤剂中重金属的试验方法。
本标准适用于食品用洗涤剂中以铅计的重金属的测定,也适用于非食品用洗涤剂中以铅计的重金属的测定。

The test method of food detergents - Determination of heavy metals

1 Scope

This standard specifies the test method for determination of heavy metals in food detergents.

This standard is applicable to the determination of heavy metals (by Pb) in both food detergents and non-food detergents.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6682 Water for analytical laboratory use - Specification and test methods

3 Principle

Under weakly acidic conditions (pH=3~4), conduct the limit test by comparing the specimen in which the heavy metal ions react with hydrogen sulfide to generate a brownish-black substance with the lead (Pb) standard solution treated with the same method.

4 Reagents

Unless otherwise stated, only recognized analytically pure reagents and Grade III water as specified in GB/T 6682 shall be used in the analysis.

4.1 Hydrochloric acid.

4.2 Hydrochloric acid, c(HCl)=6mol/L: Measure 50mL hydrochloric acid and dilute it with water to 100mL.

Foreword i
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Instruments
6 Pretreatment of specimen
7 Determination