GB/T 23278.7-2009 English PDF

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GB/T 23278.7-2009: Methods for chemical analysis of sodium stannate -- Part 7: Determination of alkali insoluble matter -- Gravimetric analysis
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23278.7-2009	149	Add to Cart	2 days	Methods for chemical analysis of sodium stannate -- Part 7: Determination of alkali insoluble matter -- Gravimetric analysis	Valid

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Basic data

Standard ID: GB/T 23278.7-2009 (GB/T23278.7-2009)
Description (Translated English): Methods for chemical analysis of sodium stannate -- Part 7: Determination of alkali insoluble matter -- Gravimetric analysis
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.040.40
Word Count Estimation: 5,515
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 in alkali insoluble sodium content. This section applies to the determination of tin in alkali insoluble sodium content. Measurement range of 0. 050% to 0. 500%.

GB/T 23278.7-2009: Methods for chemical analysis of sodium stannate -- Part 7: Determination of alkali insoluble matter -- Gravimetric analysis

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Methods for chemical analysis of sodium stannate Part 7. Determination of alkali insoluble matter Gravimetric analysis ICS 71.040.40 G10 National Standards of People's Republic of China Methods for chemical analysis of sodium stannate Part 7. alkali insolubles - Gravimetric 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. This is Part 7. 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, Yunnan Honghe Prefecture CIQ participate in the drafting. The main drafters of this section. Solutions Huifang, Yangzi Hua, Lin cream, Panliu Yan, Qinliu Ping Jiang Village stretch, Hu Yu Wei. Methods for chemical analysis of sodium stannate Part 7. alkali insolubles - Gravimetric method

1 Scope

This section GB/T 23278 specifies the determination of tin in sodium alkali-insoluble content. This section applies to the determination of tin in sodium alkali-insoluble content measured in the range of 0.050% to 0.500%.

2 Method summary

Sample with sodium hydroxide solution (10g/L) were dissolved, filtered and washed, the filters were placed in constant weight porcelain crucible, ashed. At 700 ℃ ~ Ignition to constant weight at 750 ℃. Content determined by subtraction.

3 Reagents

Test water for the three distilled water. 3.1 Sodium hydroxide solution (10g/L). Weigh 10 g of sodium hydroxide rapidly in a beaker, a small amount of water to the surface may contain Na2CO3, with water after dissolution, diluted to 1L (reagent formulation should be used to remove carbon dioxide, water).

4 Sample

The sample should be sealed packaging. Step 5 Analysis 5.1 Sample Weigh 10g sample (m1), accurate to 0.001g. 5.2 Determination of the number of Independently two determinations, the mean value. 5.3 blank test Along with sample blank test (m1 0). 5.4 Determination 5.4.1 The sample (5.1) in 250mL beaker, sodium hydroxide solution was added 100mL (3.1), covered table dish, at 70 ℃ ~ 80 ℃ water bath for 30min, so the sample is dissolved. 5.4.2 Serve hot with a slow quantitative filter paper to 40mL sodium hydroxide solution (3.1) washing the beaker and filter paper 10 times, followed by hot water to Not alkaline (phenolphthalein test paper test). 5.4.3 The filter paper and the residue was transferred to a pre-ignition to constant weight (m1 2) porcelain crucible at about 350 ℃ ashing, and then heated up to 700 ℃ ~ 750 ℃ \u200b\u200bburning 20min, removed, coolish, into the dryer, cooling 30min, weigh (m1). Calculation results of the analysis of 6 Alkali insoluble material content quality base insolubles fraction w1 alkali insoluble matter and its value is expressed in%, according to formula (1). W1 alkali insoluble matter = 1- 2- m1 m1 m1 0 M1 × 100 (1) ......

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