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SN/T 3917-2014 English PDF

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SN/T 3917-2014: Determination of lead, cadmium, arsenic and mercury content in calcined magnesite and magnesite
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SN/T 3917-2014English259 Add to Cart 3 days [Need to translate] Determination of lead, cadmium, arsenic and mercury content in calcined magnesite and magnesite Valid SN/T 3917-2014

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Basic data

Standard ID SN/T 3917-2014 (SN/T3917-2014)
Description (Translated English) Determination of lead, cadmium, arsenic and mercury content in calcined magnesite and magnesite
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard D52
Classification of International Standard 73.080
Word Count Estimation 10,129
Date of Issue 4/9/2014
Date of Implementation 11/1/2014
Quoted Standard GB/T 6379.2; GB/T 6682; GB/T 21191; JJG 694
Regulation (derived from) State inspection certification (2014) 210
Issuing agency(ies) General Administration of Customs
Summary This standard specifies the lead, cadmium, arsenic, mercury content determination of light burning magnesium (magnesite) in. This standard applies to light burning magnesium (magnesite) Determination of lead, cadmium, arsenic, mercury content. Measurement

SN/T 3917-2014: Determination of lead, cadmium, arsenic and mercury content in calcined magnesite and magnesite


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Determination of lead, cadmium, arsenic and mercury content in calcined magnesite and magnesite People's Republic of China Entry-Exit Inspection and Quarantine Standards Light burning determination of lead, cadmium, arsenic, mercury and magnesium (magnesite) Determinationoflead, cadmium, arsenicandmercurycontent Issued on. 2014-04-09 2014-11-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted. People's Republic of China Liaoning Province Exit Inspection and Quarantine. The main drafters of this standard. Xie Yan, Zeng Ze, well flat, Chen, of Interferon Wang Qi, ZHAO Jing red, Lu Qi. Light burning determination of lead, cadmium, arsenic, mercury and magnesium (magnesite) Warning --- personnel should use this standard regular laboratory work experience. This standard does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This standard specifies the lead, cadmium, arsenic, mercury content determination of light burning magnesium (magnesite) in. This standard applies to light burning magnesium (magnesite) Determination of lead, cadmium, arsenic, mercury content. Measurement range. Lead. 1mg/kg ~ 10mg/kg; Cadmium. 0.1mg/kg ~ 0.5mg/kg; arsenic. 1mg/kg ~ 10mg/kg; mercury. 0.05mg/kg ~ 0.2mg/kg.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat Of the basic methods of reproduction Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 21191 atomic fluorescence spectrometer JJG694 atomic absorption spectrophotometer test procedures --- Measured by graphite furnace atomic 3 Pb, Cd absorption spectrometry 3.1 Principle of the method Sample digestion with nitric acid in a microwave digestion instrument, until the digestion process is done, the digestion solution volume to volume. Magnesium nitrate do matrix Modifiers, using graphite furnace atomic absorption spectrometer wavelength at 283.3nm measured absorbance of lead; wavelength 228.8nm at determining cadmium Absorbance. By a linear relationship between absorbance and analyte content is calculated in a sample of lead and cadmium content. 3.2 Reagents Unless otherwise specified, the reagents were excellent pure use. The water are in line with a water GB/T 6682 regulations or equivalent purity Of water. 3.2.1 nitrate (ρ1.42g/mL). 3.2.2 nitric acid (11). formulated with nitric acid (3.2.1). 3.2.3 magnesium oxide. pure spectrum. 3.2.4 magnesium nitrate solution (50g/L). Weigh accurately 10.00g magnesium (3.2.3) into a beaker was slowly added nitric acid (3.2.2) 70mL Until completely dissolved, after cooling transferred to 200mL volumetric flask, dilute with water to volume, and mix. 3.2.5 Lead standard stock solution (1000μg/mL). 3.2.6 cadmium standard stock solution (1000μg/mL). 3.2.7 Lead and cadmium mixed standard stock solution. accurately Pipette lead standard stock solution (3.2.5) 10mL, cadmium standard stock solution (3.2.6) 1mL In 500mL flask, supplemented with nitric acid (3.2.2) 10mL, diluted with water to the mark, and mix the solution 1mL containing 20μg of lead, 2μg cadmium.

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