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GB/T 38291-2019: Determination of lead in plastic materials
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| GB/T 38291-2019 | English | 199 |
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Determination of lead in plastic materials
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GB/T 38291-2019
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Basic data | Standard ID | GB/T 38291-2019 (GB/T38291-2019) | | Description (Translated English) | Determination of lead in plastic materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.01 | | Word Count Estimation | 10,149 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38291-2019: Determination of lead in plastic materials---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of lead in plastic materials
ICS 83.080.01
G31
National Standards of People's Republic of China
Determination of lead content in plastic materials
2019-12-10 release
2020-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Plastic Standardization Technical Committee (SAC/TC15).
This standard was drafted by. China Blue Chenguang Chemical Research and Design Institute Co., Ltd., China Blue Chenguang Chemical Co., Ltd., and Guangzhou Special Pressure Equipment
Inspection Research Institute, Qingdao Product Quality Supervision and Inspection Institute, Qingdao Zhongxin Huamei Plastic Co., Ltd., Qingdao Dagang, People's Republic of China
Customs, Beijing Physical and Chemical Analysis and Testing Center.
The main drafters of this standard. Liu Lirong, Chen Minjian, Huang Guoguo, Wang Xiaobin, Zhang Caicheng, Gao Jianguo, Gaoxia, Li Maodong, Gu Xiaofeng,
Hu Guanghui, Xu Cong, Song Xiaoyun, Wang Yue.
Determination of lead content in plastic materials
Warning --- Persons using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible safety issues
Therefore, users are responsible for taking appropriate safety and health measures and ensuring that they meet the conditions stipulated by relevant national regulations.
1 Scope
This standard specifies the method for the determination of lead in plastic materials by inductively coupled plasma mass spectrometry.
This standard applies to the determination of lead content in plastic materials and their products.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 602 Preparation of standard solution for determination of impurities in chemical reagents
GB/T 6682 Analysis laboratory water specifications and test methods
GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values
3 Principle
Crush the sample, weigh a certain amount of sample powder, use dry ashing method, ammonium persulfate ashing method or microwave digestion.
Carrier gas is brought into the plasma, after being desolvated, vaporized, dissociated and ionized in a high temperature and inert argon atmosphere, after being converted into positively charged ions
Enter the mass spectrometer, and separate and characterize the measured element based on the mass-to-charge ratio.The signal intensity of the mass spectrum peak is positive for the concentration of the element to be measured in the test solution
Than, using external standard method to quantify.
4 Reagent
4.1 The required standard solution can be prepared according to GB/T 602. Unless otherwise specified, the reagents used should be of superior grade and above, and the water used should be consistent
It meets the requirements of Grade 1 water specified in GB/T 6682.
4.2 Nitric acid (HNO3), analytically pure.
4.3 Hydrogen peroxide (H2O2), analytically pure.
4.4 Tetrafluoroboric acid (40%), analytically pure.
Warning-tetrafluoroboric acid is highly corrosive and irritating, and can cause burns to the human body. Pay attention to protection during the dropping process.
4.5 Ammonium persulfate, analytically pure.
4.6 Nitric acid solution (5 95). Measure 50mL of nitric acid, add to 950mL of water, and mix.
4.7 Nitric acid solution (11). Measure 50mL nitric acid, add 50mL water, and mix.
4.8 Lead element standard stock solution (1000mg/L or other concentration). use a certain concentration that has been certified by the state and granted a standard substance certificate
Single or multi-element standard stock solution.
4.9 Internal standard element stock solution (1000mg/L or other concentrations). rhenium (Re), bismuth (Bi), etc., using nationally certified and awarded standard materials
Certificate of single or multi-element standard stock solution with certain concentration.
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