[Assay of organic bases in pharmaceutical preparations using cobalt thiocyanate].

[Assay of organic bases in pharmaceutical preparations using cobalt thiocyanate].

Pharmaceutisch weekblad. Scientific edition (1983-08-26)

J Lemli, I Knockaert

ABSTRACT

A rapid and simple colorimetric method is presented for the estimation of organic bases in pharmaceutical preparations. Solid cobalt thiocyanate reagent is used. Many bases form blue coloured ion pairs soluble in dichloromethane.

MATERIALS

Product Number

Brand

Product Description

216135

Sigma-Aldrich

Cobalt(II) thiocyanate, 96%

497274

Sigma-Aldrich

Cobalt(II) thiocyanate, 99.9% trace metals basis