DING Qiaoyan,ZHANG Huan,MA Lihua,et al.Establishment and application of a method for the determination of plasma concentration of delamanid[J].ZHONGGUO YAOFANG,2022,33(24):3029-3033.
DING Qiaoyan,ZHANG Huan,MA Lihua,et al.Establishment and application of a method for the determination of plasma concentration of delamanid[J].ZHONGGUO YAOFANG,2022,33(24):3029-3033. DOI: 10.6039/j.issn.1001-0408.2022.24.17.
Establishment and application of a method for the determination of plasma concentration of delamanid
To establish and apply a method for the determination of plasma concentration of delamanid (DLM).
METHODS
2
After plasma samples were treated with methanol precipitation, LC-MS/MS was adopted to determine the plasma concentration of DLM. The chromatographic column was Phenomenex Synergi
TM
Fusion-RP with mobile phase of methanol-0.1% formic acid solution (gradient elution). The column temperature was 40 ℃, the flow rate was 0.3 mL/min, and the sample size was 1 μL. The ion source was electrospray ion source, and positive ion scanning was carried out in multi-reaction monitoring mode. The DLM ion pair used for quantitative analysis was
m
/
z
535.0→352.0. The plasma concentration of DLM in 6 multidrug resistant tuberculosis (MDR-TB) patients were determined by the LC-MS/MS method.
RESULTS
2
The linear range of DLM was 0.05-8 μg/mL (
r
=0.999 5), and the lowest limit of quantitation was 0.05 μg/mL. RSDs of intra-batch and inter-batch precision were all less than 10%. The accuracy ranged 92.7%-104.9%. Average matrix effect was 94.3%-107.5%. Average recoveries were 93.2%-98.1%. The plasma concentration of DLM in 6 MDR-TB patients ranged from 0.61-2.76 μg/mL, with an average of (1.67±0.74) μg/mL.
CONCLUSIONS
2
The established LC-MS/MS analysis method has good specificity, high sensitivity, accuracy and precision, and can be used to determine DLM plasma concentration in MDR-TB patients.
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