High-performance liquid chromatographic determination of acetone in blood and urine in the clinical diagnostic laboratory.
A method for the determination of acetone in plasma or urine by high-performance liquid chromatography (HPLC) was developed. Plasma specimens are deproteinized with acetonitrile (1:1, v/v) 2,4-dinitrophenylhydrazine (DNPH) is added to the supernatant or to filtered urine samples, similarly treated with acetonitrile (2:1, v/v) to prevent crystallization of the synthesized phenylhydrazone. An aliquot (20 microliters) of the reaction mixture was subjected to HPLC at ambient temperature using a reversed-phase Pecosphere 3 x 3 C18 column with acetonitrile-water (45:55, v/v) as eluent at a flow-rate of 1 ml/min and detection at 365 nm. Hydroxyacetone and acetoacetate phenylhydrazone derivatives do not interfere. The identification of acetone by its retention time was confirmed by comparison with a laboratory-synthesized acetone DNPH derivative. The concentration of acetone, eluted within 3 min, was determined by the peak-height method. The detection limit was 0.034 mmol/l; the relative standard deviations were less than 5% within run (n = 20) and less than 10% between run (n = 20).
Brega
A
A
Laboratorio Biomed., Concesio, Brescia, Italy.
Villa
P
P
Quadrini
G
G
Quadri
A
A
Lucarelli
C
C
D000096:Acetone / Q000097:blood / Q000378:metabolism* / Q000652:urine; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D008297:Male; D010659:Phenylhydrazines / Q000737:chemistry
D010659:Phenylhydrazines; D000096:Acetone; C004787:2,4-dinitrophenylhydrazine