[Methodical approaches to determination of microelements in biologic materials].

The authors present data on sensitivity, accuracy and reliability of analytic methods suitable for mass determination of major microelements in human biologic materials. The findings are that, considering probable microelements content, combination of atomic absorptive analyzers appears optimal.

[Photometric detection of metacide in the air of the working area].

The method of photometric detection of metacide in the air is based on the interaction of latter with p-nitrophenyldiasonium in borate-buffer solution. The measurement takes place in 10 mm-basins at the wave-length 540 nm. The lower limit of detection is 0.

[The spectrophotometric determination of vinylimidazole and benzvinylimidazole in the air of a work area].

A spectrophotometric method of vinyl-imidazole and benzo-vinyl-imidazole detection in the air of working area is worked out. The method is based on the vinyl oxidation into formaldehyde and the detection of latter by reaction with sodium bichromotropate. The optic density is measured at 580 nm.