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GB/T 23274.3-2009 English PDF

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GB/T 23274.3-2009: Methods for chemical analysis of stannic oxide -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method
Status: Valid
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GB/T 23274.3-2009English139 Add to Cart 3 days [Need to translate] Methods for chemical analysis of stannic oxide -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method Valid GB/T 23274.3-2009

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Basic data

Standard ID GB/T 23274.3-2009 (GB/T23274.3-2009)
Description (Translated English) Methods for chemical analysis of stannic oxide -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G10
Classification of International Standard 71.040.40
Word Count Estimation 6,624
Date of Issue 2009-01-05
Date of Implementation 2009-11-01
Regulation (derived from) National Standard Approval Announcement 2009 No.2 (Total No.142)
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 determination of tin dioxide arsenic content. This section applies to the determination of tin dioxide arsenic content. 20% of the measuring range of 0. 000 to 0. 050 %.

GB/T 23274.3-2009: Methods for chemical analysis of stannic oxide -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method


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Methods for chemical analysis of stannic oxide Part 3. Determination of arsenic content Molybdoantimonyarsenate blue spectrophotometric method ICS 71.040.40 G10 National Standards of People's Republic of China Methods for chemical analysis of tin dioxide Part 3. Determination of arsenic content Arsenic and antimony molybdenum blue spectrophotometric method Posted 2009-01-05 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 23274-2009 "Methods for chemical analysis of tin dioxide" is divided into eight sections. --- Part 1. Determination of the amount of tin oxide potassium iodate titration; --- Part 2. Determination of iron content - 1,10-phenanthroline spectrophotometry; --- Part 3. Determination of arsenic content of arsenic and antimony molybdenum blue spectrophotometric method; --- Part 4. lead and copper contents - Flame atomic absorption spectrometry; --- Part 5. Determination of antimony content - Malachite green spectrophotometry; --- Part 6. Determination of sulfate Visible turbidimetric method; --- Part 7. hydrochloric acid soluble Gravimetric method; --- Part 8. Loss on ignition - Gravimetric method. This is Part 3. This part is proposed by the China Nonferrous Metals Industry Association. The non-ferrous metal part by the National Standardization Technical Committee. This section from Yunnan Tin Group Co., Ltd. is responsible for drafting. This section is Liuzhou China Tin Group Co., Ltd., Yunnan Honghe SAIEC IQ participate in the drafting. The main drafters of this section. Solutions Huifang, Yangzi Hua, Lin cream, Jiang Village stretch, Wang Li Xian, Yesu Juan. Methods for chemical analysis of tin dioxide Part 3. Determination of arsenic content Arsenic and antimony molybdenum blue spectrophotometric method

1 Scope

This section GB/T 23274 specifies the determination of arsenic content of tin dioxide. This section applies to the determination of arsenic content in tin dioxide, measured in the range of 0.00020% to 0.050%.

2 Method summary

The sample is dissolved in water, dilute sulfuric acid medium with stannous chloride, zinc metal arsenic is reduced to arsine gas, arsenic and antimony, molybdenum generate blue Antimony molybdenum blue, the absorbance is measured in a spectrophotometer at a wavelength of 700nm.

3 Reagents and apparatus

Test water are a distilled water. 3.1 arsenic-free zinc particles (3mm ~ 7mm). 3.2 potassium chlorate. 3.3 sulfate (ρ1.84g/mL). 3.4 sulfate (1 + 1). 3.5 sulfate (1 + 6). 3.6 hydrochloride (ρ1.19g/mL). 3.7 HCl (1 + 1). 3.8 tartaric acid solution (300g/L). 3.9 stannous chloride solution (400g/L). Weigh 40g of stannous chloride (SnCl2 · 2H2O) in 200mL beaker, add 80mL hydrochloric acid (3.6), cover the dish table, micro heat of solution is completely clear, and cooled to room temperature, hydrochloric acid (3.7) diluted to 100mL, and mix. 3.10 absorption solution (2g/L). Weigh 1g and 5g potassium iodine tablets mixed, dissolved in water and diluted to 500mL. 3.11 ascorbic acid solution (30g/L). now with the current. 3.12 ammonium molybdate solution (40g/L). 3.13 antimony potassium tartrate solution (4.5g/L). 3.14 color solution. Take 50mL sulfuric acid (3.5), 25mL ascorbic acid solution (3.11), 20mL ammonium molybdate solution (3.12), 5mL Antimony potassium tartrate solution (3.13) and mix. The time is now equipped with. 3.15 arsenic standard stock solution. Weigh 0.1320g trioxide (reference reagent, pre-drying to a constant weight at 105 ℃ ± 5 ℃), put 150mL beaker, 10mL sodium hydroxide solution (200g/L) dissolved, 5mL of sulfuric acid (3.3), 0.5mL of hydrogen peroxide (30%), Heated to boiling for 10min, cooled to room temperature. Moved into 1000mL volumetric flask, dilute with water to volume, and mix. This solution containing 1mL 100μg arsenic. 3.16 Arsenic standard solution. Pipette 25.00mL arsenic standard stock solution (3.15), placed in 500mL volumetric flask, dilute to the mark, Mix well. This solution 1mL containing 5μg arsenic. 3.17 arsine occurred and absorption devices Arsine occurred and absorbing device shown in Figure 1.

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