Methods for chemical analysis of zinc oxide produced by direct process -
Part 6: Testing of metallic zinc
1 Scope
This part of GB/T 4372 specifies the methods for testing metallic zinc in zinc oxide produced by direct process.
This part is applicable to the testing of metallic zinc in zinc oxide produced by direct process. The lower detection limit shall be: ≥0.065% for metallic zinc; ≥0.008% for metallic aluminum.
2 Method summary
Mix the specimen and anthraquinone evenly, add the sodium hydroxide solution, stir it until it becomes pasty, and heat it. The specimen will show wine red spots if it contains metallic zinc, by which the presence of metallic zinc may be tested. The same reaction is also available for metallic aluminum, so the testing result obtained by this method is taken as the total content of metallic zinc and metallic aluminum. Sulfite, sulfide, thiosulfate, metallic iron, etc. do not affect the testing.
3 Reagents
3.1 Anthraquinone (ground into powder in mortar before use).
3.2 Sodium hydroxide solution: 200g/L.
4 Apparatus
30mL glass dish with a bottom diameter of about 50 mm.
5 Specimen
5.1 The specimen shall have a particle size smaller than 0.10 mm.
5.2 Parch the specimen at 100℃~105℃ for 2h, after that, cool it to ambient temperature in a desiccator.
6 Testing procedures
Foreword i 1 Scope 2 Method summary 3 Reagents 4 Apparatus 5 Specimen 6 Testing procedures 7 Test report
Standard
GB/T 4372.6-2014 Methods for chemical analysis of zincoxide produced by direct process―Part 6:Testing of metallic zinc (English Version)
Standard No.
GB/T 4372.6-2014
Status
valid
Language
English
File Format
PDF
Word Count
3500 words
Price(USD)
90.0
Implemented on
2015-8-1
Delivery
via email in 1 business day
Detail of GB/T 4372.6-2014
Standard No.
GB/T 4372.6-2014
English Name
Methods for chemical analysis of zincoxide produced by direct process―Part 6:Testing of metallic zinc
Methods for chemical analysis of zinc oxide produced by direct process -
Part 6: Testing of metallic zinc
1 Scope
This part of GB/T 4372 specifies the methods for testing metallic zinc in zinc oxide produced by direct process.
This part is applicable to the testing of metallic zinc in zinc oxide produced by direct process. The lower detection limit shall be: ≥0.065% for metallic zinc; ≥0.008% for metallic aluminum.
2 Method summary
Mix the specimen and anthraquinone evenly, add the sodium hydroxide solution, stir it until it becomes pasty, and heat it. The specimen will show wine red spots if it contains metallic zinc, by which the presence of metallic zinc may be tested. The same reaction is also available for metallic aluminum, so the testing result obtained by this method is taken as the total content of metallic zinc and metallic aluminum. Sulfite, sulfide, thiosulfate, metallic iron, etc. do not affect the testing.
3 Reagents
3.1 Anthraquinone (ground into powder in mortar before use).
3.2 Sodium hydroxide solution: 200g/L.
4 Apparatus
30mL glass dish with a bottom diameter of about 50 mm.
5 Specimen
5.1 The specimen shall have a particle size smaller than 0.10 mm.
5.2 Parch the specimen at 100℃~105℃ for 2h, after that, cool it to ambient temperature in a desiccator.
6 Testing procedures
Contents of GB/T 4372.6-2014
Foreword i
1 Scope
2 Method summary
3 Reagents
4 Apparatus
5 Specimen
6 Testing procedures
7 Test report
