SN/T 2004.2-2005 English PDF

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SN/T 2004.2-2005: Determination of lead, cadmium, chromium, electrical and electronic products Part 2: Flame atomic absorption spectrometry
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 2004.2-2005	239	Add to Cart	2 days	Determination of lead, cadmium, chromium, electrical and electronic products Part 2: Flame atomic absorption spectrometry	Obsolete

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Basic data

Standard ID: SN/T 2004.2-2005 (SN/T2004.2-2005)
Description (Translated English): Determination of lead, cadmium, chromium, electrical and electronic products Part 2: Flame atomic absorption spectrometry
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: L09
Classification of International Standard: 31.020
Word Count Estimation: 6,613
Date of Issue: 2005-07-18
Date of Implementation: 2006-01-18
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary: This standard specifies the electrical and electronic products, lead, cadmium and chromium by flame atomic absorption spectrometric method. This standard applies to electrical and electronic products in a variety of materials of lead, cadmium, chromium content.

SN/T 2004.2-2005: Determination of lead, cadmium, chromium, electrical and electronic products Part 2: Flame atomic absorption spectrometry

---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, cadmium, chromium, electrical and electronic products Part 2. Flame atomic absorption spectrometry Book of the People's Republic of China Entry and Exit Inspection and Quarantine SN/T 2004.2-2005 Determination of lead, cadmium and chromium in electrical and electronic products Part 2. flame atomic absorption spectrometry Released on July 17,.2005 Implementation of.2006-01-18 People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This part is the second part of SN/T 2004. Appendix A of this section is an informative annex. This part is proposed and managed by the National Certification and Accreditation Administration. This part is drafted by the Shenzhen Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Jilin Province Entry-Exit Inspection and Quarantine The bureau participated in the drafting. The main drafters of this section. Liu Zhihong, Liu Li, Chen Mingyan, Guo Yan, Chen Yuyu, Li Ying, Li Hui, Wu Jingwu. This section is the first industry standard for entry-exit inspection and quarantine. SN/T 2004.2-2005 Determination of lead, cadmium and chromium in electrical and electronic products Part 2. flame atomic absorption spectrometry

1 Scope

This section specifies methods for the determination of lead, cadmium and chromium in electrical and electronic products by flame atomic absorption spectrometry. This section applies to the determination of lead, cadmium and chromium content in various materials of electrical and electronic products.

2 Method summary

For metal materials in electrical and electronic products, it is directly treated by conventional acid digestion; for other materials, closed high temperature pressure tanks are used - Acid digestion treatment. Lead, cadmium, and chromium in the material are dissolved salts in the acid digestion solution. Digestion liquid into flame atomic absorption spectrometry The measurement was carried out in a photometer.

3 reagents

Unless otherwise stated, only reagents identified as analytically pure and above and distilled or deionized water or water of comparable purity were used in the analysis. 3.1 Nitric acid (HNO3). excellent grade pure. 3.2 Nitric acid solution (2+98). 3.3 30% hydrogen peroxide (H2O2). analytically pure. 3.4 Hydrochloric acid (HCl). excellent grade pure. 3.5 Hydrofluoric acid (HF). excellent grade pure. 3.6 Lead, cadmium, chromium standard solution. concentration of 100mg/L or 1000mg/L.

4 Instruments and equipment

4.1 Flame atomic absorption spectrophotometer. equipped with lead, cadmium and chromium hollow cathode lamps. See Appendix A for instrument operating conditions. 4.2 Oven. (0 ~.200) ° C, temperature control accuracy ± 5 ° C. 4.3 Pressure tank. Teflon liner and stainless steel tank jacket. 4.4 Electric heating plate. 4.5 Crushing equipment. chainsaws, grinders, metal cutting machines, lathes, etc.

5 sample preparation

5.1 polymer material The sample is ground into a powder sample having a particle diameter of not more than 1 mm by a crushing device such as a chainsaw or a grinder. 5.2 Metal material The sample is processed into a chip or a strip having a diameter of not more than 1 mm and a length of not more than 5 mm by a metal cutter, a lathe or the like. 5.3 Other materials The preparation method is the same as 5.1.

6 Analysis steps

6.1 Sample digestion 6.1.1 Pressure tank digestion method This method is applicable to the samples referred to in 5.1 and 5.3. Weigh the sample (0.2 ~ 0.5) g, accurate to 1mg, placed in a pressure tank (4.3), add 8mL nitric acid (3.1), 2mL 30% peroxidation SN/T 2004.2-2005 ......

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