GUO Hao,GAN Ge,LI Chen,GUO Dong-dong,DUAN Jie,MA Jian,WANG Li-chun,LAI Jie,CHEN Jun-hong.Determination of 12 Volatile Organic Compounds in Blood Using Headspace Gas Chromatography-Mass Spectrometry[J].Journal of Instrumental Analysis,2026,45(10):2195-2201.
The headspace gas chromatography-mass spectrometry method was established to quantitatively determine 12 volatile organic compounds(VOCs) in whole blood. Critical parameters,including the amount of dimethyl sulfoxide(DMSO) used as a cosolvent,sodium chloride addition,incubation temperature,and incubation time,were optimized. The optimal experimental conditions were as follows:2 400 mg of DMSO was added as the co-solvent,the blood sample was diluted threefold,1.5 g of sodium chloride was added,the headspace incubation temperature was set to 75 ℃,and the incubation time was 30 min. Separation was performed on an HP-PLOT/Q capillary column(30 m×0.32 mm×0.32 μm),and detection was performed in selected ion monitoring mode. The target analytes were well-separated,and accurate quantitative results were obtained. The method validation showed that the 12 VOCs exhibited good linearity within the tested concentration range,with the correlation coefficients(
r
2
) exceeding 0.99. The limit of detection ranged from 2 to 56 ng/mL. The average recoveries at different spiked levels ranged from 86.1% to 111%,with relative standard deviations of 1.1%-9.6%. The developed method is simple and rapid and provides reliable qualitative and quantitative results,making it suitable for determining VOCs in whole blood.
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