SEPARATION AND DETERMINATION OF SULFIDES COMBINED WITH IRON IN THE GEOLOGICAL SAMPLES

Autor:	Jiaqi Zhou, Chaoyong Hu, Zhongwu Ma, Shucheng Xie
Rok vydání:	2010
Předmět:	chemistry.chemical_compound Colloid chemistry medicine.diagnostic_test Sodium Sodium hypochlorite Spectrophotometry Ferric hydroxide medicine chemistry.chemical_element Geology Sulphosalicylic acid Nuclear chemistry
Zdroj:	Marine Geology & Quaternary Geology. 30:143-146
ISSN:	0256-1492
DOI:	10.3724/sp.j.1140.2010.02143
Popis:	A method was proposed for the determination of trace iron released from sulfides in geological samples.Iron was extracted and spectrophotometry measured by sulphosalicylic acid after sulfides were oxidized by sodium hypochlorite.The results show that 30% of sodium hypochlorite soaking the sample for more than 40 hours could transform iron sulfides completely into colloidal ferric hydroxide,which can be easily extracted by the sulphosalicylic acid solution.We integrate the selective sepatation,enrichment and determination of iron in the procedure to make the method simple and suitable for determination of iron sulfides in geological samples.
Databáze:	OpenAIRE
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