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7837748 
Journal Article 
ATOMIC-ABSORPTION SPECTROPHOTOMETRY OF MANGANESE BY USING SOLVENT-EXTRACTION WITH POTASSIUM BENZYLXANTHATE - METHYL ISOBUTYL KETONE 
Aihara, M; Kiboku, M 
1977 
1 
Bunseki Kagaku / Analysis Chemistry
ISSN: 0525-1931 
26 
2 
111-116 
English 
WOS:A1977CW38700007 
Atomic absorption spectrophotometric determination of manganese (II and VII) was studied by using the solvent extraction with potassium xanthate (KRX) as a chelating agent, viz., potassium propylxanthate (KPrX), potassium butylxanthate (KBtX), potassium amylxanthate (KAmX) and potassium benzylxanthate (KBzX). Especially, KBzX was superior as the chelating agent in terms of wide optimum pH region, less effect of co-existing ions, high sensitivity and precision. The procedure was as follows; To a sample solution containing up to 10μg of manganese (II and VII) in a 50-ml separatory funnel were added 5 ml of 10% ammonium acetate buffer. After adjusting the pH of the sample solution in the vicinity of 8 with diluted ammonium water or acetic acid, 10 ml of 15% KPrX, 10% KBtX, 5% KAmX or 5% KBzX solution were added and Mn-RX complex was extracted with 10.0 ml of MIBK by shaking for 3 minutes. The MIBK phase was aspirated in the air-acetylene flame. In the case of KPrX, KBtX or KAmX, Ag(I), Cd(II), Co(II), Cu(II) and Zn(II) at a 400-fold excess to the amount of manganese interfered, though in the case of KBzX those ions did not. Interference of hexacyanoferrate anion was observed for every kind of KRX. The coefficient of variation calculated from the determination of ten runs was from 0.32 to 1.09%, and precision of this method was better than that of APDC method. By this method, the determination of manganese in human tissues (liver, lung kidney and pancreas) was performed successfully. This method may be used satisfactorily for other practical routine analysis because KBzX is synthesized easily and purely. © 1977, The Japan Society for Analytical Chemistry. All rights reserved. 
Atomic absorption spectrophotometry; Human tissues; Manganese; MIBK extraction; Potassium benzylxanthate