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Isolation and identification of a new impurity in lorazepam substance

I Cepanec1, H Mikuldas, M Litvić

  • 1Department for Development of Chemical Synthesis, Belupo Pharmaceuticals & Cosmetics, Zagreb, Croatia. belupo-razvoj-sinteze@belupo.tel.hr

Die Pharmazie
|January 31, 2002
PubMed

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Qualitative Analysis03:46

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...