DETERMINATION OF MICRO-AMOUNTS OF POLYTHIONATES .11. SPECTROPHOTOMETRIC DETERMINATION OF 2 SPECIES OF POLYTHIONATES IN THEIR MIXTURES BY CYANOLYSIS AND SOLVENT-EXTRACTION

被引：17

作者：

KOH, T ^{[1
]}

AOKI, Y ^{[1
]}

IWASAKI, I ^{[1
]}

机构：

[1] TOHO UNIV,FAC SCI,DEPT CHEM,CHIBA 274,JAPAN

来源：

ANALYST | 1979年 / 104卷 / 1234期

关键词：

Cyanolysis; Methylene blue; Polythionate determination; Spectrophotometry; Thiocyanate;

D O I：

10.1039/an9790400041

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Two species of polythionates, when present in their mixtures, have been determined by solvent extraction and spectrophotometry of the thiocyanate formed by cyanolysis of polythionates in both the absence and presence of copper(II) ions. When 1 mol of polythionate, SxO62- (where x=4, 5 or 6) undergoes cyanolysis, x-2 mol of thiocyanate are formed in the presence of copper(II) ions; in the absence of Cu(II), x-3 mol of thiocyanate are formed. Therefore, the value of x in SxO62- can be evaluated. By using these values, the composition of solutions containing two species of polythionates was calculated. The present method can be applied to the determination of two species of polythionates when mixed in various ratios at a concentration level of micromoles per litre.

引用

收藏

页码：41 / 46

页数：6

相关论文

共 16 条

[1] NEUE VERFAHREN ZUR DARSTELLUNG VON KALIUMPENTATHIONAT UND VON KALIUMHEXATHIONAT [J].

GOEHRING, M ;

FELDMANN, U .

ZEITSCHRIFT FUR ANORGANISCHE CHEMIE, 1948, 257 (5-6) :223-226

[2] CYANOLYSIS AND SPECTROPHOTOMETRIC ESTIMATION OF TRITHIONATE IN MIXTURE WITH THIOSULFATE AND TETRATHIONATE [J].

KELLY, DP ;

CHAMBERS, LA ;

TRUDINGE.PA .

ANALYTICAL CHEMISTRY, 1969, 41 (07) :898-&

[3] DETERMINATION OF MICRO AMOUNTS OF POLYTHIONATES .3. A PHOTOMETRIC METHOD FOR DETERMINATION OF TETRATHIONATE BY MEANS OF ITS CYANOLYSIS [J].

KOH, T ;

IWASAKI, I .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1966, 39 (02) :352-+

[4]

KOH T, 1972, ANAL CHIM ACTA, V61, P449

[5] A NEW SPECTROPHOTOMETRIC METHOD FOR DETERMINATION OF MICRO AMOUNTS OF THIOCYANATE BY SOLVENT EXTRACTION [J].

KOH, T ;

IWASAKI, I .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1967, 40 (03) :569-+

[6] DETERMINATION OF MICRO AMOUNTS OF POLYTHIONATES .V. A PHOTOMETRIC METHOD FOR DETERMINATION OF POLYTHIONATES WHEN 2 SPEDIES OF THEM TETRA- PENTA- AND HEXATHIONATE ARE PRESENT TOGETHER [J].

KOH, T ;

IWASAKI, I .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1966, 39 (04) :703-+

[7] DETERMINATION OF MICRO AMOUNTS OF POLYTHIONATES .I. A PHOTOMETRIC METHOD FOR DETERMINATION OF PENTATHIONATE BY MEANS OF ITS CYANOLYSIS [J].

KOH, T .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1965, 38 (09) :1510-+

[8] DETERMINATION OF MICRO AMOUNTS OF POLYTHIONATES .2. A PHOTOMETRIC METHOD FOR DETERMINATION OF HEXATHIONATE BY MEANS OF ITS CYANOLYSIS [J].

KOH, T ;

IWASAKI, I .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1965, 38 (12) :2135-+

[9] DETERMINATION OF MICRO-AMOUNTS OF POLYTHIONATES .8. CYANOLYSIS OF TRITHIONATE BY CATALYSIS WITH LANTHANUM(III) AND PHOTOMETRIC DETERMINATION OF TRITHIONATE [J].

KOH, T ;

WAGAI, A ;

MIURA, Y .

ANALYTICA CHIMICA ACTA, 1974, 71 (02) :367-374

[10]

KOH T, 1973, BUNSEKI KAGAKU JAPAN, V22, P322