GB/T 23274.1-2009Methods for chemical analysis of stannic oxide - Part 1: Determination of stannic oxide content - Potassium iodate titrimetric method (English PDF)

Foreword

GB/T 23274-2009 "tin dioxide chemical analysis method" is divided into eight parts. - Part 1. Determination of the amount of tin oxide Potassium iodate titration; - Part 2. Determination of iron content - 1,10 - phenanthroline spectrophotometric method; - Part 3. Determination of arsenic content - Arsenic antimony molybdenum blue spectrophotometric method; - Part 4. Determination of lead and copper - Flame atomic absorption spectrometric method; - Part 5. Determination of antimony content - Malachite green spectrophotometric method; - Part 6. Determination of sulphate - Visual turbidimetric method; - Part 7. Determination of hydrochloric acid soluble matter - Gravimetric method; Part 8. Determination of ignition weight loss - Weight method. This section is part 1. This part is made by China Nonferrous Metals Industry Association. This part of the National Standardization Technical Committee of Nonferrous Metals. This part is drafted by Yunnan tin industry group limited liability company. This part is drafted by Liuzhou Huaxi Group Co., Ltd. and Yunnan Honghe State Entry-Exit Inspection and Quarantine Bureau. The main drafters of this part. Ding Xibo, Gao Chunxia, Li Hongying, Lin Wenfeng, Jiang Zhai, Tan Liuping, Wang Lixian. Methods for chemical analysis of tin dioxide Part 1. determination of the amount of tin dioxide Potassium iodate titration

1 Scope

GB/T 23274.1-2009 is the Chinese national standard on methods for chemical analysis of stannic oxide - part 1: determination of stannic oxide content - potassium iodate titrimetric method, in the field of chemical technology. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 5 January 2009 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 November 2009. Classification: ICS 71.040.40, CCS G10. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This part of GB/T 23274 specifies the method for the determination of tin dioxide in tin dioxide. This part applies to the determination of tin dioxide in tin dioxide, the determination of the range of > 95%.

2 Method summary

Samples with zinc powder - sodium hydroxide melting, hydrochloric acid leaching, with iron powder and metal aluminum to tin reduced to divalent. To starch as an indicator, with iodic acid Potassium titration solution titration test solution was light blue for the end.

3 Reagents and devices

Test water for the three distilled water.

3.1 Zinc powder.

3.2 metal tin (tin mass fraction >= 99.85%).

3.3 reduced iron powder (0.074mm).

3.4 Aluminum (aluminum mass fraction >=99.5%).

3.5 Sodium hydroxide.

3.6 Sodium chloride.

3.7 Hydrochloric acid (1 + 1).

3.8 Potassium iodate standard titration solution [c (1/6KIO3) = 0.05mol/L].