Speciation of organotin compounds using inductively coupled plasma mass spectrometry with micellar liquid chromatography

Abstract

Chlorides of dimethyltin, trimethyltin, dibutyltin, tributyltin, diphenyltin and triphenyltin were completely separated within 20 min by micellar liquid chromatography using tris (hydroxymethyl) aminomethane dodecylsulfate as a mobile phase and butyl group bonded silica gel as a stationary phase. The eluates were directly introduced into the inductively coupled plasma mass spectrometer and detected at m/z= 120. Detection limits for the six organotin compounds were 24 to 51 pg as Sn. The linear dynamic range was 1 × 10–3 to 10 mg l–1. Relative standard deviation (n= 5) was less than 3% for all the organotin compounds.