GB/T 23278.3-2009 English PDF

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GB/T 23278.3-2009: Methods for chemical analysis of sodium stannate -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23278.3-2009	139	Add to Cart	3 days	Methods for chemical analysis of sodium stannate -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate blue spectrophotometric method	Valid

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Basic data

Standard ID: GB/T 23278.3-2009 (GB/T23278.3-2009)
Description (Translated English): Methods for chemical analysis of sodium stannate -- 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: 6,676
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 sodium arsenic content. This section applies to the determination of tin sodium arsenic content. Measurement range of 0. 0002% to 0. 005%.

GB/T 23278.3-2009: Methods for chemical analysis of sodium stannate -- Part 3: Determination of arsenic content -- Molybdo antimony arsenate 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 sodium stannate 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 sodium stannate 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 23278 "Methods for chemical analysis of sodium stannate" is divided into eight sections. --- Part 1. Determination of tin content 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. Determination of lead content - Atomic absorption spectrometry; --- Part 5. Determination of antimony content - Malachite green spectrophotometry; --- Part 6. Determination of the free base neutralization titration method; --- Part 7. alkali insolubles - Gravimetric method; --- Part 8. Determination of nitrate ion selective electrode method. Division is divided into three parts. 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 standard by Liuzhou China Tin Group, Yunnan Honghe Prefecture CIQ participate in the drafting. The main drafters of this section. Solutions Huifang, Yangzi Hua, Lin cream, Yesu Juan Jiang Village stretch, Wang Li Xian. Methods for chemical analysis of sodium stannate Part 3. Determination of arsenic content Arsenic and antimony molybdenum blue spectrophotometric method

1 Scope

This section GB/T 23278 specifies the determination of tin in sodium arsenic content. This section applies to the determination of tin in sodium arsenic content was measured in the range of 0.0002% to 0.005%.

2 Method summary

The sample is dissolved in water, dilute sulfuric acid medium with stannous chloride, zinc metal arsenic is reduced to arsine gas, iodine - potassium iodide solution suction Income, arsenic and antimony, molybdenum, antimony molybdenum blue blue generated at a wavelength of 700nm spectrophotometer measured absorbance.

3 Reagents and apparatus

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

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