GB/T 38292-2019 English PDF

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GB/T 38292-2019: Determination of mercury in plastic materials
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38292-2019	199	Add to Cart	3 days	Determination of mercury in plastic materials	Valid

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Basic data

Standard ID: GB/T 38292-2019 (GB/T38292-2019)
Description (Translated English): Determination of mercury in plastic materials
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G31
Classification of International Standard: 83.080.01
Word Count Estimation: 10,116
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 38292-2019: Determination of mercury 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 mercury in plastic materials ICS 83.080.01 G31 National Standards of People's Republic of China Determination of mercury 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. Qingdao Dagang Customs of the People's Republic of China, Zhonglan Chenguang Chengdu Testing Technology Co., Ltd., Juhua Group Co., Ltd. Company, Qingdao Product Quality Supervision and Inspection Institute, Beijing Physical and Chemical Analysis and Test Center, Qingdao Zhongxin Huamei Plastic Co., Ltd., Jiangnan University , Jiangsu Taiter New Material Technology Co., Ltd. The main drafters of this standard. Gao Jianguo, Liu Lirong, Wu Zhouan, Zhai Shixing, Hu Guanghui, Zhang Songlei, Xia Haifeng, Yang Sheng, Song Xiaoyun, Wang Xiaobin, Liu Weili, Gao Xia, Wang Yue. Determination of mercury 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 of atomic fluorescence spectrometry and inductively coupled plasma mass spectrometry for the determination of mercury in plastic materials. This standard applies to the determination of mercury 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 Atomic fluorescence spectroscopy

3.1 Principle Pulverize the sample, weigh a certain amount of sample powder, digest it by microwave digestion, the digestion solution enters the atomic fluorescence instrument, and the potassium borohydride solution Under reduction, mercury atom vapor is generated. These gases form ground-state atoms in an argon-hydrogen flame and are produced under the excitation of light emitted by a hollow cathode lamp Atomic fluorescence, the intensity of atomic fluorescence is proportional to the mercury content in the sample, and is quantified by external standard method. 3.2 Reagent Warning-tetrafluoroboric acid is highly corrosive and irritating, and can cause burns to the human body. Pay attention to protection during the dropping process. Unless otherwise stated, the reagents used should be of superior grade pure and above, and the water used should meet the requirements of first-class water specified in GB/T 6682. 3.2.1 Nitric acid (HNO3), analytically pure. 3.2.2 Hydrochloric acid (HCl), analytically pure. 3.2.3 Hydrogen peroxide (H2O2), analytically pure. 3.2.4 Tetrafluoroboric acid (40%), analytically pure. 3.2.5 Potassium borohydride (KBH4), analytically pure. 3.2.6 Potassium hydroxide (KOH), analytically pure. 3.2.7 Potassium dichromate (K2CrO4), analytically pure. 3.2.8 Potassium borohydride (KBH4) solution. Weigh 0.5g of potassium hydroxide into a beaker containing 100mL of distilled water, stir with a glass rod After complete dissolution, add 1.0 g of potassium borohydride weighed and stir to dissolve. This solution should be prepared daily. Can also use sodium hydroxide, borohydride Sodium is used to prepare sodium borohydride solution. 3.2.9 Hydrochloric acid solution (5 95). Measure 50mL of hydrochloric acid, add 950mL of water, and mix. 3.2.10 Potassium dichromate solution (fixing solution). Dissolve 0.5g potassium dichromate in 950mL water, then add 50mL nitric acid and mix well. 3.2.11 Mercury 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 ......

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