[Determination of bis (p-fluorobenzyl) trisulfide and bis (p-fluoro-benzyl) disulfide in lungs of rat by HPLC].
To establish an HPLC method for analysis of bis(p-fluorobenzyl) trisulfide(BFTS) and bis(p-fluorobenzyl)disulfide(BFDS) in the lungs of rat.



5.0 ml extract solvent (n-hexane: isopropyl alcohol=95:5, v/v) and 20 microl of 11.50 microg/ml dibenzyl disulfide (internal standard) were added to 0.2 g lung sample followed by homogenization. After centrifugation, 4.0 ml of supernatant was separated and vaporized to dryness, and the residue was reconstituted in mobile phase for HPLC analysis. The HPLC analysis was performed on an SB C18 column using acetonitrile and water (65:35, v/v) as mobile phase with a flow rate of 1.0 ml/min with UV detection at 220 nm.



The calibration curves for BFTS and BFDS in sample were linear over the concentration ranges of 0.04712-14.78 microg/g(r=0.999) and 0.04831-23.96 microg/g(r=0.999), respectively. The limits of quantification were 0.04712 microg/g and 0.04831 microg/g for BFTS and BFDS, respectively. The assay recoveries for BFTS and BFDS ranged from 95.71%-107.2% and 90.00%-110.5%, respectively. The precisions were obtained with RSD of <10%. The developed method was successfully applied to study the content of BFTS and BFDS in the lungs of rats after intravenous injection of 12.5 mg/kg BFTS.



The method developed is simple, selective, repeatable and accurate, which can be applied to study the tissue distribution of BFTS and BFDS.
Luo
Shu-qing
SQ
Department of Pharmaceutical Analysis and Drug Metabolism, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
Chen
Ting
T
Sun
Dong-li
DL
Xing
Yu-ting
YT
Jiang
Hui-di
HD
Zeng
Su
S
D000818:Animals; D000970:Antineoplastic Agents / Q000378:metabolism / Q000493:pharmacokinetics*; D002851:Chromatography, High Pressure Liquid; D005464:Fluorobenzenes / Q000032:analysis / Q000378:metabolism / Q000493:pharmacokinetics*; D008168:Lung / Q000378:metabolism*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013440:Sulfides / Q000032:analysis / Q000378:metabolism / Q000493:pharmacokinetics*
D000970:Antineoplastic Agents; D005464:Fluorobenzenes; D013440:Sulfides; C528265:fluorapacin