GB/T 3253.1-2008 English PDF

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GB/T 3253.1-2008: Methods for chemical analysis of antimony and antimony trioxide -- Determination of arsenic content -- Arsenic molybdenum blue spectrophotometric method
Status: Valid

GB/T 3253.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3253.1-2008	139	Add to Cart	3 days	Methods for chemical analysis of antimony and antimony trioxide -- Determination of arsenic content -- Arsenic molybdenum blue spectrophotometric method	Valid
GB/T 3253.1-2001	199	Add to Cart	2 days	Methods for chemical analysis of antimony -- Determination of arsenic content	Obsolete
GB/T 3253.1-1982	RFQ	ASK	3 days	Chemical analysis of antimony--The molybdenum blue photometric method for determination of arsenic	Obsolete

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Basic data

Standard ID: GB/T 3253.1-2008 (GB/T3253.1-2008)
Description (Translated English): Methods for chemical analysis of antimony and antimony trioxide -- Determination of arsenic content -- Arsenic molybdenum blue spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.99
Word Count Estimation: 6,679
Date of Issue: 2008-03-31
Date of Implementation: 2008-09-01
Older Standard (superseded by this standard): GB/T 3253.1-2001; GB/T 3254.2-1998
Regulation (derived from): National Standard Approval Announcement 2008 No.5 (Total No.118)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the method for the determination of antimony trioxide and arsenic content. This section applies to the determination of arsenic, antimony and antimony trioxide in the amount. Measurement range: 0. 0020% to 0. 60%.

GB/T 3253.1-2008: Methods for chemical analysis of antimony and antimony trioxide -- Determination of arsenic content -- Arsenic molybdenum blue spectrophotometric method

---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.
Methods for chemical analysis of antimony and antimony trioxide. Determination of arsenic content. Arsenic molybdenum blue spectrophotometric method ICS 77.120.99 H13 National Standards of People's Republic of China Replacing GB/T 3253.1-2001 GB/T 3254.2-1998 Methods for chemical analysis of antimony and antimony trioxide Determination of arsenic content of arsenic molybdenum blue spectrophotometric method Posted 2008-03-31 2008-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 3253 "Methods for chemical analysis of antimony and antimony trioxide," a total of 11 parts. --- GB/T 3253.1 chemical analysis of antimony trioxide and arsenic content of molybdenum blue spectrophotometric determination of arsenic --- GB /antimony trioxide and chemical analysis of iron content measured T 3253.2 phenanthroline spectrophotometry --- GB/T 3253.3 antimony trioxide and chemical analysis of lead content - Flame Atomic Absorption Spectrometry --- Determination of GB/T 3253.4 antimony trioxide and sulfur content of chemical analysis methods --- GB/T 3253.5 antimony trioxide and chemical analysis of copper content - Flame Atomic Absorption Spectrometry --- GB/T 3253.6 and antimony trioxide of selenium content - Atomic Fluorescence Spectrometry --- GB T 3253.7 antimony trioxide and chemical analysis methods Determination of bismuth content / --- Determination of GB/T 3253.8 antimony trioxide and antimony trioxide amount of chemical analysis methods --- Determination of GB/T 3253.9 antimony trioxide and chemical analysis of cadmium content --- Determination of GB/T 3253.10 antimony trioxide and chemical analysis of mercury content Determination --- GB/T 3253.11 antimony trioxide and analysis of lead, copper, bismuth, cadmium, iron, selenium, chromium, arsenic, mercury, tin content This is Part 1. This Part replaces GB/T 3253.1-2001 "chemical analysis of antimony - Determination of arsenic content", GB/T 3254.2-1998 "trioxide Methods for chemical analysis of antimony - Determination of arsenic content. " Compared with GB/T 3253.1-2001, GB/T 3254.2-1998, following this section change. --- Detection limit extends from 0.0050% to 0.0020%; --- Complements the precision and quality assurance and control provisions; --- Text format has been modified. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This part of tin mining Twinkling Star Antimony Industry Co., Ltd., China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This section was drafted by the tin mining flash-antimony industry limited liability company. This section is Hunan Chenzhou Mining Co., Ltd., Hunan Nonferrous Metal Research Institute participated in the drafting. The main drafters of this section. Wu Donghua, Song should ball, Mao Xiaohong. This part certifier. Wu Shaobo, Pangwen Lin, Yang Deli. This part of the standard replaces the previous editions are. --- GB/T 3253.1-1982, GB/T 3253.1-2001; --- GB/T 3254.2-1998. Methods for chemical analysis of antimony and antimony trioxide Determination of arsenic content of arsenic molybdenum blue spectrophotometric method

1 Scope

This section provides the determination of antimony trioxide and arsenic content. This section applies to the determination of arsenic, antimony and antimony trioxide in the amount. Measurement range. 0.0020% to 0.60%.

2 Method summary

Sample was dissolved with sulfuric acid, hydrochloric acid solution in not less than 9mol/L, the arsenic trichloride was extracted with benzene to coexist with the substrate, and other miscellaneous Mass separation. After back-extracted with water and oxidized to pentavalent arsenic and arsenic, plus ammonium molybdate and hydrazine sulfate generate arsenic molybdenum blue wavelength spectrophotometer Measuring the absorbance at 660nm.

3 Reagents and materials

3.1 commercially available reagents 3.1.1 sulfate (ρ1.84g/mL). 3.1.2 hydrochloric acid (ρ1.19g/mL). 3.1.3 Benzene 3.2 solution 3.2.1 sulfuric acid (1 + 20). 3.2.2 sulfuric acid (1 + 1). 3.2.3 sulfite (1 + 2). 3.2.4 sodium hydroxide solution (300g/L). stored in a plastic bottle. 3.2.5 iodine solution (5g/L). Weigh 0.5g iodine, 1g of potassium iodide in 250mL beaker, 5mL water was added to dissolve, dilute to 100mL, stored in a brown bottle. 3.2.6 ammonium molybdate solution (15g/L). Weigh 1.5g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] placed in 250mL beaker, add 40mL water, 50mL was added sulfuric acid (3.2.2), transferred to a glass bottle after cooling. Diluted with water to 100mL, and mix. 3.2.7 hydrazine sulfate solution (0.5g/L). 3.2.8 phenolphthalein ethanol solution (1g/L). 3.3 standard solution 3.3.1 arsenic standard stock solution Accurately weigh 0.1320g benchmark arsenic trioxide (≥99.9%, advance after 100 ℃ ~ 110 ℃ drying 2h placed in a desiccator cold To room temperature), was added 20mL of sodium hydroxide solution (50g/L) was dissolved clear, was added 100mL of water, 10 mL of sulfuric acid (3.2.2) and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 100μg arsenic. 3.3.2 arsenic standard solution Pipette 10.00mL arsenic standard stock solution (3.3.1) in 100mL volumetric flask, dilute with water to volume, and mix. This solution 1mL containing 10μg arsenic.

4 Instrument

Spectrophotometer. ......

Image     

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