Simultaneous determination of vanillylmandelic acid, homovanillic acid and creatinine in urine by reversed-phase ion-pair chromatography

1990 ◽  
Vol 530 ◽  
pp. 418-423 ◽  
Author(s):  
Toshio Tokuda ◽  
Tsunemi Tokieda ◽  
Akira Anazawa ◽  
Masanori Yoshioka
Keyword(s):  
Simultaneous Determination ◽  
Homovanillic Acid ◽  
Reversed Phase ◽  
Ion Pair ◽  
Vanillylmandelic Acid ◽  
Ion Pair Chromatography

Simultaneous determination of primary and secondary aliphatic alcohols by reversed-phase ion-pair chromatography

1995 ◽  
Vol 32 (7) ◽  
pp. 271 ◽  
Author(s):  
Lin K. Liu ◽  
Margaret Y. L. Wong-Leung ◽  
Albert W. M. Lee ◽  
K. C. Li
Keyword(s):  
Simultaneous Determination ◽  
Reversed Phase ◽  
Ion Pair ◽  
Aliphatic Alcohols ◽  
Ion Pair Chromatography

Determination of vanillylmandelic acid with ion-pair chromatography and fluorescence detection.

1986 ◽  
Vol 32 (4) ◽  
pp. 693-696 ◽  
Author(s):  
K Lindgren ◽  
N Rodopoulos
Keyword(s):  
Internal Standard ◽  
Reversed Phase ◽  
Ion Pair ◽  
Fluorescence Signal ◽  
Vanillylmandelic Acid ◽  
Ultraviolet Spectrophotometry ◽  
Ion Pair Chromatography ◽  
Chromatographic Procedure ◽  
The Mean

Abstract We describe a chromatographic procedure for sensitive (2.0 mumol/L), specific quantification of vanillylmandelic acid (VMA) in urine with iso-VMA as an internal standard. After rapid extraction from urine, the VMA is determined by isocratic reversed-phase ion-pair chromatography on a bonded C8 column and detection of the native fluorescence on excitation at 285 nm. The fluorescence signal is quite dependent on the pH of the mobile phase. Results by the method vary linearly with VMA concentration up to 320 mumol/L and correlate well (r = 0.9880) with those obtained by conventional ultraviolet spectrophotometry. The mean 24-h excretion of VMA from 29 healthy volunteers was 21.4 (SD 5.4) mumol.

Reversed-phase ion-pair chromatography in determination of sinomenine contents in Sinomenium acutum

2010 ◽  
Vol 30 (2) ◽  
pp. 193-195
Author(s):  
Hui WANG ◽  
Qing YE ◽  
Liang ZHAO ◽  
Wen-jun TIAN ◽  
Guo-qing ZHANG
Keyword(s):  
Reversed Phase ◽  
Ion Pair ◽  
Ion Pair Chromatography ◽  
Sinomenium Acutum

Simultaneous Determination of Ajmaline and 17-Monochloroacetylajmaline by Ion-Pair Reversed-Phase HPCL

1984 ◽  
Vol 17 (5) ◽  
pp. 423-431 ◽  
Author(s):  
L. Gagliardi ◽  
G. Cavazzutti ◽  
A. Amato ◽  
V. Zagarese ◽  
F. Chimenit ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Reversed Phase ◽  
Ion Pair
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