GB/T 23278.2-2009 English PDF

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GB/T 23278.2-2009: Methods for chemical analysis of sodium stannate -- Part 2: Determination of iron content. 1, 10-phenanthroline photometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23278.2-2009	139	Add to Cart	3 days	Methods for chemical analysis of sodium stannate -- Part 2: Determination of iron content. 1, 10-phenanthroline photometric method	Valid

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Basic data

Standard ID: GB/T 23278.2-2009 (GB/T23278.2-2009)
Description (Translated English): Methods for chemical analysis of sodium stannate -- Part 2: Determination of iron content. 1, 10-phenanthroline photometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.040.40
Word Count Estimation: 6,667
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 the determination of tin sodium iron content. This section applies to the determination of tin sodium iron content. Measuring range of 0. 00025% to 0. 040%.

GB/T 23278.2-2009: Methods for chemical analysis of sodium stannate -- Part 2: Determination of iron content. 1, 10-phenanthroline photometric 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 2. Determination of iron content 1, 10-phenanthroline photometric method. ICS 71.040.40 G10 National Standards of People's Republic of China Methods for chemical analysis of sodium stannate Part 2. Determination of iron content 1,10 phenanthroline spectrophotometry 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 2. 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. Highland, Zhang Limei, Zhang Hongling, cream Lin, who Lihua, Jiangzhai Sheng, Zhang. Methods for chemical analysis of sodium stannate Part 2. Determination of iron content 1,10 phenanthroline spectrophotometry

1 Scope

This section GB/T 23278 specifies the method for the determination of tin in sodium iron content. This section applies to the determination of tin in sodium iron content was measured in the range of 0.00025% to 0.040%.

2 Method summary

The sample was dissolved by hydrochloric acid, tartaric acid, EDTA masking interference tin, lead coexisting elements in pH6 ~ pH7 solution with hydrochloric acid hydroxyl Amine Fe (Ⅲ) reduction of Fe (Ⅱ), and 1,10-phenanthroline to form a red complex in a spectrophotometer at 510nm wavelength absorption measured Luminosity.

3 Reagents

Test water for the three distilled water. 3.1 hydrochloride (ρ1.19g/mL). 3.2 Hydrogen peroxide (30%). 3.3 hydrochloric acid (1 + 19). 3.4 ammonia (2 + 1). 3.5 tartaric acid solution (200g/L). 3.6 EDTA solution (25g/L). 3.7 pairs nitrophenol solution (1g/L). 3.8 hydroxylamine hydrochloride solution (100g/L). 3.9 1,10-phenanthroline solution (2.5g/L). Weigh 0.25g1,10- phenanthroline, was dissolved in 10mL of absolute ethanol, diluted with water To 100mL. 3.10 iron standard stock solution. Weigh 0.1000g metallic iron (mass fraction ≥99.99%) in 200mL beaker, add 10mL salt Acid (3.1), cover sheet pan, add 1mL of hydrogen peroxide (3.2), heat gently to dissolve completely in time to make chlorine and boiled and cooled. Purge water table dish and cup Wall, moved into 1000mL volumetric flask, dilute to volume, and mix. This solution 1mL containing 100μg iron. 3.11 Iron standard solution. Pipette 50.00mL iron standard stock solution in 500mL flask, add 2mL of hydrochloric acid (3.1), diluted with water To the mark, and mix. This solution 1mL containing 10μg iron.

4 Sample

The sample should be sealed packaging. Step 5 Analysis 5.1 Sample Table 1 sample was weighed (m1 0), accurate to 0.0001g. ......

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