Insecticide-Synergist Analysis, Chromatographic Separation and Colorimetric Determination of Pyrethrins and Piperonyl Butoxide Mixtures

1962 ◽  
Vol 10 (3) ◽  
pp. 248-251 ◽  
Author(s):  
P. T. Allen ◽  
H. F. Beckman ◽  
J. F. Fudge
Keyword(s):  
Chromatographic Separation ◽  
Piperonyl Butoxide ◽  
Colorimetric Determination ◽  
Insecticide Synergist

Electrochemical Behavior and Determination of the Insecticide Synergist Piperonyl Butoxide

1997 ◽  
Vol 69 (5) ◽  
pp. 898-903 ◽  
Author(s):  
Darren C. Coomber ◽  
Daryl J. Tucker ◽  
Alan M. Bond
Keyword(s):  
Electrochemical Behavior ◽  
Piperonyl Butoxide ◽  
Insecticide Synergist

The Colorimetric Determination of Piperonyl Butoxide

1952 ◽  
Vol 35 (3) ◽  
pp. 771-780 ◽  
Author(s):  
Howard A Jones ◽  
H J Ackermann ◽  
Marion E Webster
Keyword(s):  
Piperonyl Butoxide ◽  
Colorimetric Determination

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum

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%.

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