Determination of micro amounts of elements using the ring oven method with preliminary chromatographic separation

1963 ◽  
Vol 51 (2) ◽  
pp. 313-315 ◽  
Author(s):  
M. B. Ćelap ◽  
T. J. Janjić
Keyword(s):  
Chromatographic Separation ◽  
Oven Method ◽  
Ring Oven

Application of the ring oven method to the determination of dyestuffs

1965 ◽  
Vol 53 (4) ◽  
pp. 647-651 ◽  
Author(s):  
M. B. Ćelap ◽  
T. J. Janjić ◽  
V. D. Jevtić
Keyword(s):  
Oven Method ◽  
Ring Oven

A ring oven method for the determination of sulfate at nanogram levels

1978 ◽  
Vol 70 (5-6) ◽  
pp. 505-510 ◽  
Author(s):  
Purnendu K. Dasgupta ◽  
Philip W. West
Keyword(s):  
Oven Method ◽  
Ring Oven

Determination of gases with the ring-oven method

1985 ◽  
Vol 85 (1-2) ◽  
pp. 45-53 ◽  
Author(s):  
Herbert Weisz ◽  
Hans J�rgen K�lsch
Keyword(s):  
Oven Method ◽  
Ring Oven

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%.

Determination of Sulfite in Beer Based on Fluorescent Derivatives and Liquid Chromatographic Separation

2012 ◽  
Vol 70 (4) ◽  
pp. 296-302 ◽  
Author(s):  
Victor Abrahamsson ◽  
Signe Hoff ◽  
Nikoline J. Nielsen ◽  
Marianne N. Lund ◽  
Mogens L. Andersen
Keyword(s):  
Chromatographic Separation ◽  
Liquid Chromatographic Separation ◽  
Liquid Chromatographic ◽  
Fluorescent Derivatives
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