Simultaneous Determination of Fungicides ThIuram and Tebuconazole in Grain by High Performance Liquid or Micellar Electrokinetic Chromatography

Optimal conditions for separation and determination by HPLC or MEKC combined fungicides thiuram and tebuconazole are selected. The method of simultaneous determination of pesticides in grain offered. The recovery of pesticides was 90–95%. Lower bounds defined by the contents of pesticides, taking into account the concentration amounted to 0.005 mg kg−1 in the MEKC method, and 0.0025 mg kg−1 in the method of HPLC. The relative standard deviation of the results of the analysis is less than 0.09, analysis of the duration of 1–1.5 h.

The Investigation of Benzimidazoles’ Sorption on Modified Silicagels and Hypercrosslinked Polystyrene by HPLC

The production of good-quality, effective and harmless pharmaceutical products and import substitution of drugs are of top priority for the pharmaceutical industry. Benzimidazole and its derivatives are active substances of many drugs due to the wide range of their pharmacological activity. In the article under consideration the sorption of the newly synthesized benzimidazole’s derivatives from liquids media was studied. Reverse phase high performance liquid chromatography (RP HPLC) is the most appropriate method used for the analysis of biologically active substances, particularly drugs.