[A comparison of methods of determining 4-pyridoxic acid in urine].
Routine fluorescent assays for urine 4-pyridoxic acid (4-PA) in variants of lactone 4-PA external standard (variant 1) and internal 4-PA standard (variant 2) were compared to high performance liquid chromatography. Correlation between the two values were defined by specially derived equation. The internal standard is preferable, as variant 1 presents underestimated results. Variant 2 is limited to high 4-PA concentrations, being unfit in low ones for overestimating the data. The chromatography proved most reliable and specific.
Beketova
N A
NA
Vrzhesinskaia
O A
OA
Kodentsova
V M
VM
Zaburkina
T G
TG
Bender
E D
ED
Iakushina
L M
LM
D000328:Adult; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008875:Middle Aged; D011735:Pyridoxic Acid / Q000652:urine*; D013050:Spectrometry, Fluorescence
D011735:Pyridoxic Acid
Sravnenie metodov opredeleniia 4-piridoksilovoĭ kisloty v moche.