In this project, literatures related to the analysis technologies of organotin were reviewed. Also, analytical parameters of dibutyltin dilaurate and dibutyltin dichloride in LC/MS/MS were confirmed and chromatographic conditions and calibration curve were established. Quality control requirements of dibutyltin dilaurate and dibutyltin dichloride analysis method in the outfall water were also established. The method detection limits of the dibutyltin dilaurate and dibutyltin dichloride are 0.853 and 0.212 μg/L, respectively, which meet the requirements of the law enforcement. Requirements for the estimated concentration of the disclosed organotin discharge waste water pollutants. Three kinds of instrument tests have been completed in the announcement of toxic substances, including Pyr-GC/MS, GC/MS, and LC/MS/MS. Recommends were made that the toxic substances analysis can be preliminarily characterized by EGA mode of Py-GC/MS, and then by LC /MS/MS quantification, avoids sample derivatization procedures, and can simultaneously analyze organotin compounds such as butyltin,
triphenyltin chloride and tripropyltin chloride.
Since the organotin compound is a coordination compound, the original bonding group to the metal will be easily substituted. When the sample contains more than two kinds of organotin compounds with the same butyl group, it is easy to cause a qualitative misjudgment. After some modification, tributyltin, triphenyltin chloride and tripropyltin chloride can be simultaneously analyzed with liquid chromatography tandem mass spectrometer. It is recommended to follow strategies in other countries for the management of organotin, and evaluate the toxicity by sum of organotin homologues with same number of branch to avoid problems such as misjudgment caused by matrix effect in analysis.