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GB/T 23278.1-2009 English PDF

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GB/T 23278.1-2009: Methods for chemical analysis of sodium stannate -- Part 1: Determination of tin content -- Titration
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GB/T 23278.1-2009English139 Add to Cart 3 days [Need to translate] Methods for chemical analysis of sodium stannate -- Part 1: Determination of tin content -- Titration Valid GB/T 23278.1-2009

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Basic data

Standard ID GB/T 23278.1-2009 (GB/T23278.1-2009)
Description (Translated English) Methods for chemical analysis of sodium stannate -- Part 1: Determination of tin content -- Titration
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G10
Classification of International Standard 71.040.40
Word Count Estimation 6,668
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 method for determination of sodium tin tin content. This section applies to the determination of tin in tin content of sodium. Measuring range of 35. 00% ~ 44. 00%.

GB/T 23278.1-2009: Methods for chemical analysis of sodium stannate -- Part 1: Determination of tin content -- Titration


---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 1. Determination of tin content Titration. ICS 71.040.40 G10 National Standards of People's Republic of China Methods for chemical analysis of sodium stannate Part 1. Determination of tin content potassium iodate titration 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. This is Part 1. 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 Prefecture CIQ participate in the drafting. The main drafters of this section. Dingxi Bo, Priscilla, high Chun-xia, Sukhumvit, cream Lin Jiang Village stretch, Wang Li Xian Shou Jie cloud. Methods for chemical analysis of sodium stannate Part 1. Determination of tin content potassium iodate titration

1 Scope

This section GB/T 23278 specifies the method for determination of sodium tin tin content. This section applies to the determination of tin tin sodium content was measured in the range of 35.00% ~ 44.00%.

2 Method summary

The sample was dissolved by hydrochloric acid with iron powder, aluminum reduction tin (Ⅳ) tin (Ⅱ), iron powder to eliminate the influence of dissolved oxygen, starch indicator, iodine Potassium standard solution titration tin (Ⅱ).

3 Reagents and apparatus

Test water for the three distilled water. 3.1 aluminum (mass fraction ≥99.5%). 3.2 reduced iron (by 0.074mm sieve). 3.3 tin (mass fraction ≥99.85%). 3.4 hydrochloride (ρ1.19g/mL). 3.5 HCl (1 + 1). 3.6 standard potassium iodate titration solution [Ba (1/6KIO3) = 0.05mol/L]. 3.6.1 preparation. Weigh 17.9g of potassium iodate dissolved in 500mL of water was added 89.5g of potassium iodide and 10g anhydrous sodium carbonate dissolved in water Diluted to 10L, shake. 3.6.2 Calibration. Weigh 0.1200g (m1 0) tin (3.3) placed in 300mL conical flask, 1g reduced iron (3.2), 80mL Hydrochloric acid (3.5), the reduction means connected to the flask. Low tin heated to dissolve, add 20mL water, was added 1.5g of aluminum (3.1). continuous Shake the flask to dissolve most metals aluminum, heating was continued to boil test solution to produce large bubbles about 1 minute. Under the protection of carbon dioxide gas, The Erlenmeyer flask into the cold water bath to cool to room temperature. Remove the conical flask and immediately 5mL starch solution (3.7), a standard titration with potassium iodate Light blue solution was titrated to the end point (Vp 1). At the same time a blank test (V0). According to equation (1) to calculate the actual concentration of potassium iodate standard titration solution. Ba m1 = 0 · W1 (Sn) 59.35 × (Vp Vp 1- 0) × 10-3 (1) Where. Ba --- the actual concentration of potassium iodate standard titration solution, expressed in moles per liter (mol/L); M1 0 --- metal tin in grams (g); Quality w1 (Sn) --- tin fraction; When Vp 1 --- calibration standard potassium iodate titration titration volume consumed tin standard solution, in milliliters (mL); V0 --- the calibration, the volume of standard potassium iodate titration titration blank test solution consumed solution in milliliters (mL); 59.35 --- tin (1/2Sn) molar mass in grams per mole (g/mol). When three parallel calibration, the poor value of not more than 1.5 × 10-4mol/L, the mean value, or re-calibration. 3.7 starch solution (10g/L). Weigh 1g of soluble starch into 300mL beaker, add 20mL water, slurried with stirring plus Into 20mL of sodium hydroxide solution (25g/L), and dissolved with stirring, was added 60mL of water. 3.8 carbon dioxide gas.

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