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GB/T 23274.2-2009Methods for chemical analysis of stannic oxide - Part 2: Determination of iron content - 1, 10-phenanthroline photometric method (English PDF)

二氧化锡化学分析方法第2部分：铁量的测定 1，10-二氮杂菲分光光度法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

January 5, 2009

Implementation date

November 1, 2009

Scope

GB/T 23274.2-2009 is the English-translated version of 二氧化锡化学分析方法第2部分：铁量的测定 1，10-二氮杂菲分光光度法.

GB/T 23274.2-2009 is the Chinese standard "Methods for chemical analysis of stannic oxide - Part 2: Determination of iron content - 1, 10-phenanthroline photometric method".

Its scope clause reads: This section GB/T 23274 specifies the method for determination of tin dioxide in iron content. This section applies to the determination of tin oxide of iron content, measured in the range of 0.010% to 0.070%. Its clauses include method summary; reagents; sample.

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Document preview — GB/T 23274.2-2009

National Standard of the People's Republic of China

ICS: 71.040.40
Classification: G 10

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Method summary
3 Reagents
4 Sample

1 Scope

This section GB/T 23274 specifies the method for determination of tin dioxide in iron content.

This section applies to the determination of tin oxide of iron content, measured in the range of 0.010% to 0.070%.

2 Method summary

Sample by melting sodium hydroxide, tartaric acid, EDTA masking interference of coexisting elements in pH5 ~ pH6 solution with hydroxylamine hydrochloride

The 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

Sodium hydroxide (GR).

3.2

hydrochloride (rho1.19g/mL).

3.3

Hydrogen peroxide (30%).

Ammonia 3.4 (1 + 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).

To 100mL, and mix.

3.10 iron standard stock solution

Weigh 0.1000g metallic iron (iron mass fraction >=99.99%) in 200mL beaker,

10mL hydrochloric acid (3.2), cover sheet pan, add 1mL of hydrogen peroxide (3.3), heat gently to dissolve completely in time to make chlorine and boiled and cooled. Water purge

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 (3.10) in 500mL flask, add 2mL of hydrochloric acid (3.2) to

Dilute with water to volume, and mix. This solution 1mL containing 10µg iron.

4 Sample

The sample should be sealed packaging.

Step 5 Analysis 5.1 Determination of the number of

Independently two determinations, the mean value.

5.2 blank test

Along with sample blank test.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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