Ion-pair reversed-phase chromatography of 7-R-O-methylnogarol and related compounds

1984 ◽  
Vol 288 ◽  
pp. 365-376 ◽  
Author(s):  
P.H. Zoutendam ◽  
T.M. Ryan
Keyword(s):  
Reversed Phase ◽  
Ion Pair ◽  
Reversed Phase Chromatography ◽  
Related Compounds

Determination of isotope fractionation of Cr(iii) during oxidation by LC/low-resolution MC-ICPMS

2020 ◽  
Vol 35 (3) ◽  
pp. 560-566
Author(s):  
Jakub Karasiński ◽  
Cuc Thi Nguyen-Marcińczyk ◽  
Marcin Wojciechowski ◽  
Ewa Bulska ◽  
Ludwik Halicz
Keyword(s):  
Inductively Coupled Plasma ◽  
Isotope Fractionation ◽  
Isotopic Analysis ◽  
Reversed Phase ◽  
Ion Pair ◽  
Reversed Phase Chromatography ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Sensitive Method

A robust and sensitive method for the precise isotopic analysis of 53Cr/50Cr during Cr(iii) oxidation by coupling ion pair reversed-phase chromatography and Multicollector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is presented.

scholarly journals Determination of DiazaCon in Quail Feed and Quail Serum by Ion Pair Reversed-Phase Chromatography

2001 ◽  
Vol 84 (3) ◽  
pp. 634-639 ◽  
Author(s):  
John J Johnston ◽  
Margaret J Goodall ◽  
Jerome C Hurley ◽  
Christi A Yoder ◽  
Lowell A Miller
Keyword(s):  
Aqueous Solution ◽  
Ion Pairing ◽  
Reversed Phase ◽  
Ion Pair ◽  
Butyl Chloride ◽  
Reversed Phase Chromatography ◽  
Limits Of Detection ◽  
The Mean ◽  
Liquid Chromatographic

Abstract Liquid chromatographic (LC) methods were developed for quantitating the potential avian contraceptive DiazaCon in quail feed and serum. DiazaCon was extracted from ground quail feed with basic n-butyl chloride. The n-butyl chloride extract was evaporated to dryness. The DiazaCon residues were dissolved in an aqueous methanolic ion pairing solution and quantitated by LC at 206 nm. Avian sera was combined with an equal volume of a pH 4 aqueous solution of ion pairing reagent and filtered to remove interfering proteins. DiazaCon was quantitated by LC. Mean recoveries for 500 and 2000 ppm fortified feed were 89.1 and 91.0%, respectively. The mean recovery for sera fortified at 5 levels ranging from 35 to 2000 ppm was 84.9%. Method limits of detection were approximately 14 and 13 ppm for feed and sera, respectively.

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