Fast Chromatographic Separation of Plasticizers on Thin Layers of an Inorganic Ion-Exchanger: Quantitative Determination of Di(2-ethylhexyl)phthalate

2006 ◽  
Vol 65 (3-4) ◽  
pp. 245-248 ◽  
Author(s):  
A. Mirzaie ◽  
A. Jamshidi ◽  
S. Waqif-Husain
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Separation ◽  
Thin Layers ◽  
Ion Exchanger ◽  
Inorganic Ion Exchanger ◽  
Inorganic Ion ◽  
Ethylhexyl Phthalate

DETERMINATION OF MICRO-AMOUNTS OF 5β-PREGNAN-3α-OL-20-ONE IN URINE USING INFRARED-SPECTROMETRY

1962 ◽  
Vol 41 (2) ◽  
pp. 234-246 ◽  
Author(s):  
H. J. van der Molen
Keyword(s):  
Infrared Spectrum ◽  
Quantitative Determination ◽  
Acid Hydrolysis ◽  
Chromatographic Separation ◽  
Pure Form ◽  
Infrared Spectrometry ◽  
Hydrolysis Of

ABSTRACT A procedure for the quantitative determination of 5β-pregnan-3α-ol-20-one in urine is described. After acid hydrolysis of the pregnanolone-conjugates in urine, the free steroids are extracted with toluene. Pregnanolone is isolated in a pure form as its acetate; after chromatographic separation of the free steroids on alumina, the fraction containing pregnanolone is acetylated and rechromatographed on alumina. Quantitative determination of the isolated pregnanolone-acetate is carried out with the aid of the infrared spectrum recorded by a micro KBr-wafermethod. The reliability of the method under various conditions is discussed under the headings, specificity, accuracy, precision and sensitivity. It is possible to determine 30–40 μg pregnanolone in a 24-hours urine portion with a precision of 25%.

Ferrocyanide molybdate, a new inorganic ion exchanger—I

1965 ◽  
Vol 27 (3) ◽  
pp. 683-695 ◽  
Author(s):  
L.H. Baetslé ◽  
D. Van Deyck ◽  
D. Huys
Keyword(s):  
Ion Exchanger ◽  
Inorganic Ion Exchanger ◽  
Inorganic Ion
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