Determination of 2-mercaptobenzothiazole, tolyltriazole and benzotriazole in coolant formulations by liquid chromatography.
An analytical method based on high-performance liquid chromatography is suitable for the determination of corrosion inhibitors in coolant solutions based on ethylene glycol. An isocratic system of methanol/aqueous sodium acetate buffer is used with a Microbondapak C18 column. Recovery is 99+%, with a sensitivity of 0.05% w/w. No sample pretreatment is necessary. Analysis time is 15 min.
Schmitt
T M
TM
Central Research and Development, BASF Wyandotte Corporation, Wyandotte, MI 48192 U.S.A.
Muzher
E S
ES