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GB/T 34438-2017: Determination of cadmium in toy materials -- Flame atomic absorption spectrometry
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GB/T 34438-2017: Determination of cadmium in toy materials -- Flame atomic absorption spectrometry

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Determination of cadmium in toy materials - Flame atomic absorption spectrometry ICS 97.00.50 Y57 National Standards of People's Republic of China Determination of cadmium in toy materials Flame atomic absorption spectrometry 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard proposed by the China Light Industry Federation. This standard by the National Toy Standardization Technical Committee (SAC/TC253) centralized. This standard was drafted by Shenzhen Entry-Exit Inspection and Quarantine Bureau Toy Testing Technology Center, Bureau Veritas US Product Testing (Shanghai) Co., Ltd., Good children's Children's Products Co., Ltd., Guangdong Exit Inspection and Quarantine Inspection and Quarantine Technology Center Toys Baby Products Laboratory, Jiangsu billion Branch Measurement Technology Services Ltd., Shenzhen Institute of Metrology and Quality Inspection, Commodity Quality Supervision and Inspection Center daily commodity inspection in Zhejiang Province Test Institute of Science, Beijing Light Alliance Certification Center. The main drafters of this standard. Liangshuwen, Mai Baohua, Yang Danhua, Zhang Yao, Zou Yu, Hu Juyuan, Chen Dewen, Liao on the rich. Determination of cadmium in toy materials Flame atomic absorption spectrometry Warning --- personnel using this standard should have the formal laboratory work experience. This standard does not indicate all possible safety problem. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the relevant provisions of the state.

1 Scope

This standard specifies the method of flame atomic absorption spectrometry determination of cadmium content in toy materials. This standard applies to toys in the coating, plastic (except fluorine plastic), natural or synthetic textiles, paper and cardboard, metal materials, cadmium content Determination.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 602 chemical reagent impurity standard solution preparation GB/T 6379.2 accuracy of measurement methods and results (accuracy and precision) Part 2. Determination of standard measurement methods repeated The basic method of sexuality and reproducibility GB/T 6682 analytical laboratory water specifications and test methods

3 principle

Sample using electric heating plate digestion or microwave digestion. Digestion solution was determined by flame atomic absorption spectrometry at a wavelength of 228.8nm, External standard method to determine the concentration of cadmium in the solution, calculate the content of cadmium in the sample.

4 Reagents and materials

Unless otherwise noted, all reagents are superior grade pure. 4.1 water, at least to meet the three water GB/T 6682 requirements. 4.2 nitric acid, the mass fraction is 65% ~ 68%. 4.3 sulfuric acid mass fraction of 95% to 98%. 4.4 Hydrogen peroxide. The mass fraction is 35%. 4.5 hydrochloric acid mass fraction of 35% to 37%. 4.6 Nitric acid. The volume fraction is 10%. 4.7 sulfuric acid volume fraction is 10%. 4.8 Cadmium standard solution (1000mg/L), according to GB/T 602 preparation or direct purchase with traceability certificate of the standard material. 4.9 Cadmium standard working solution 1. Pipette a certain volume of cadmium standard solution (4.8) in 100mL volumetric flask, diluted with nitric acid (4.6) until engraved Degree, mixing, formulated into a concentration of 0.05mg/L, 0.1mg/L, 0.2mg/L, 0.5mg/L, 1.0mg/L standard solution. 4.10 Cadmium standard working solution 2. Pipette a certain volume of cadmium standard solution (4.8) in 100mL volumetric flask, diluted with sulfuric acid (4.7) until engraved ...