HUANG Bo-kun,ZHANG Cheng-long,YAN Xiao-jun,YANG Rui-qin.Determination of Sulfide Ions in Blood Based on Amperometric Detection of Ion Chromatography[J].Journal of Instrumental Analysis,2025,44(12):2624-2628.
HUANG Bo-kun,ZHANG Cheng-long,YAN Xiao-jun,YANG Rui-qin.Determination of Sulfide Ions in Blood Based on Amperometric Detection of Ion Chromatography[J].Journal of Instrumental Analysis,2025,44(12):2624-2628. DOI: 10.12452/j.fxcsxb.250402257.
Determination of Sulfide Ions in Blood Based on Amperometric Detection of Ion Chromatography
A new method of ion chromatography with amperometric detection was established to detect sulfide ions in blood poisoned by hydrogen sulfide. Sodium tetraborate-formic acid solution was added to the blood sample as a buffer reagent,and the protein was precipitated by methanol. After high-speed centrifugation,the supernatant was taken to adjust the pH,filtered by a 0.22 μm organic phase syringe filter,and the sulfide ions in the blood were qualitatively and quantitatively analyzed by ion chromatography-amperometric detector. The experimental results showed that the sulfide ion concentration showed a good linear relationship in the range of 0.02-3.0 μg/mL(correlation coefficient
r
2
=0.999 1),the detection limit(LOD) and quantitative limit(LOQ) were 0.007 5 μg/mL and 0.025 μg/mL,respectively,the matrix e
ffect was 12.5%,the intra-day precision was 4.1%-8.0%,and the inter-day precision was 8.5%-13%. Based on the detection results of fresh blood samples from healthy individuals,this study proposes a diagnostic threshold for poisoning. In this study,an ion chromatography-amperometric detector method for the determination of sulfide ions in blood was established for the first time,which has the advantages of convenience,high efficiency,high sensitivity and simple operation,and provides a new idea for the detection of blood poisoned by hydrogen sulfide in forensic science.
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