GB/T 23278.4-2009 English PDF

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GB/T 23278.4-2009: Methods for chemical analysis of sodium stannate -- Part 4: Determination of lead content -- Flame atomic absorption spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 23278.4-2009	139	Add to Cart	3 days	Methods for chemical analysis of sodium stannate -- Part 4: Determination of lead content -- Flame atomic absorption spectrometry	Valid

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Basic data

Standard ID: GB/T 23278.4-2009 (GB/T23278.4-2009)
Description (Translated English): Methods for chemical analysis of sodium stannate -- Part 4: Determination of lead content -- Flame atomic absorption spectrometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G10
Classification of International Standard: 71.040.40
Word Count Estimation: 6,681
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 lead in tin sodium content. This section applies to the determination of sodium tin lead content. Measurement range of 0. 0010% to 0. 0030%.

GB/T 23278.4-2009: Methods for chemical analysis of sodium stannate -- Part 4: Determination of lead content -- Flame atomic absorption spectrometry

---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 4. Determination of lead content Flame atomic absorption spectrometry. ICS 71.040.40 G10 National Standards of People's Republic of China Methods for chemical analysis of sodium stannate Part 4. Determination of lead content Atomic Absorption Spectrometry 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 4. 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, Xu Dengqiong, ginger Kau glass, frost Lin Jiang Village extension, Zhang Jing, Yesu Juan. Methods for chemical analysis of sodium stannate Part 4. Determination of lead content Atomic Absorption Spectrometry

1 Scope

This section GB/T 23278 specifies the method for determination of sodium tin lead content. This section applies to the determination of lead, tin sodium content measured in the range of 0.0010% to 0.0030%.

2 Method summary

Sample decomposition with aqua regia, in 10% aqua regia medium flame atomic absorption spectrometer at a wavelength of 283.3nm, air - acetylene fire Determination of flame.

3 Reagents

Test water for the three distilled water. Nitrate 3.1 (ρ1.42g/mL). 3.2 hydrochloride (ρ1.19g/mL). 3.3 aqua regia. 3.4 lead standard stock solution. Weigh 0.5000g metallic lead (mass fraction ≥99.999%), placed in 200mL beaker, add 20mL (1 + 2) nitric acid, heat gently to dissolve, remove the cooled and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL Containing 500μg lead. 3.5 Lead standard solution. Pipette 20.00mL lead standard stock solution (3.4) in 200mL flask, add 5mL hydrochloric acid (3.2), with Dilute with water to volume, and mix. This solution 1mL containing 50μg lead.

4 Instrument

Atomic absorption spectrometer, with a lead hollow cathode lamp, deuterium lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Characteristic concentration. a solution in the matrix is \u200b\u200bconsistent with the measured solution, characteristic concentration of lead should not exceed 0.12μg/mL; --- Precision. measure 10 times the absorbance of the highest concentration of the standard solution, the standard deviation should not exceed 1% of the average absorbance; with The lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum concentration 0.5% of the mean absorbance of the standard solution; --- Linear curve. A standard curve is divided into five sections according to concentration, absorbance difference of the absorbance difference between the highest and the lowest segment segment Ratio of not less than 0.7.

5 Sample

The sample should be sealed packaging. Step 6 Analysis 6.1 Sample Weigh 2.0g sample (m1), accurate to 0.0001g. ......

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