Properties and analytical applications of the heteropolymolybdates of phosphorus, arsenic, silicon and germanium?I Spectrophotometric examination of the heteropoly acids

Halász, A.; Püngor, E.

doi:10.1016/0039-9140(71)80088-7

Cited by 21 publications

(1 citation statement)

References 3 publications

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“…26,37 Curves 2 and 3 show the changes in the absorbance in the presence of sea salt, and their plateaus appeared at 15% and 17% lower levels than in curve 1, respectively. This can be attributed to the fact that the formation of the β -complex was incomplete, and accompanied by the formation of the α -complex, depending on the concentration of sea salt.…”

Section: Effect Of Salt On the Conventional Silicomolybdenum Yellow Amentioning

confidence: 99%

An Indirect Spectrophotometric Method for the Determination of Silicon in Serum, Whole Blood and Erythrocytes

Tamada

2003

ANAL. SCI.

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An indirect method for the determination of silicon in blood samples has been developed. The proposed method overcame interference from a large amount of salts and phosphate in blood samples, and enabled us to determine the silicon contents in serum and whole blood by the same operation. After blood samples were digested by microwave heating, silicon, present as silicate in the sample solution, was reacted with molybdate to form a silicomolybdate complex. The complex was then separated from unreacted molybdate by a cation-exchange resin column. The molybdate liberated from the complex was spectrophotometrically determined in place of silicon. Since the method is not affected the composition of matrices between serum and whole blood, it could achieve good precision and accuracy, and could also estimate the silicon contents in erythrocytes from those in serum and whole blood. The sensitivity of the method was almost equal to that of the conventional silicomolybdenum blue method, and the calibration curve was linear up to 50 µmol l -1 of silicon with a detection limit of 1.1 µmol l -1 in whole blood. The mean concentrations of silicon in five healthy subjects were 11 µmol l -1 for serum, 28 µmol l -1 for whole blood and 50 µmol l -1 for erythrocytes. Thus, the obtained distribution ratio between serum and erythrocytes was in the range of 0.15 -0.39, and was found to be included in a narrow range.

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Section: Effect Of Salt On the Conventional Silicomolybdenum Yellow Amentioning

confidence: 99%