Studies on the extraction and determination of metal salts with methylisobutyl ketone XV

1971 ◽  
Vol 255 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Norio Ichinose
Keyword(s):  
Metal Salts ◽  
Methylisobutyl Ketone

Chemiluminescence determination of chromium(VI), molybdenum(VI), and vanadium(V) with bis-(2,4,6-trichlorophenyl) oxalate and perylene

1982 ◽  
Vol 47 (6) ◽  
pp. 1606-1612 ◽  
Author(s):  
Záviš Holzbecher ◽  
Lubomír Kábrt ◽  
Lubomír Janšta
Keyword(s):  
Hydrogen Peroxide ◽  
Standard Deviation ◽  
Oxygen Transfer ◽  
Methyl Acetate ◽  
Catalytic Effect ◽  
Metal Salts ◽  
Experimental Conditions ◽  
Chromium Vi ◽  
Relative Standard

The effect of the experimental conditions (pH, ionic strength, hydrogen peroxide concentration) and of various metal salts on the chemiluminescence occurring during oxidation of bis-(2,4,6-trichlorophenyl) oxalate (TCPO) with hydrogen peroxide in the presence of perylene was studied in water-methyl acetate solutions. The spectrum of the emitted radiation was found practically identical with the fluorescence spectrum of perylene. The observed catalytic effect of Cr(IV), Mo(VI), and V(V) on the chemiluminescence reaction in question can be explained so that these elements form peroxo acids with hydrogen peroxide, thereby facilitating the oxygen transfer from the latter to TCPO. Based on this phenomenon, a method is suggested for the determination of the above elements in concentrations about 10-3 to 10-4 mol l-1; its precision, represented by the relative standard deviation, is about 3-4%, the limits of determination of Cr(VI), Mo(VI), and V(V) are approximately 5-10 μg.

Determination of trace levels of fatty acid metal salts by high-performance liquid chromatography with fluorescence prelabeling

1984 ◽  
Vol 136 (2) ◽  
pp. 314-320 ◽  
Author(s):  
Katsumi Hayashi ◽  
Jiro Kawase ◽  
Koichi Yoshimura ◽  
Katsutoshi Ara ◽  
Kazuro Tsuji
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Fatty Acid ◽  
High Performance ◽  
Metal Salts
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