RESUMO
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.
Assuntos
Oligoelementos/análise , Animais , Bovinos , Cabelo/química , Humanos , Leite/química , Sensibilidade e Especificidade , Espectrofotometria Atômica , Oligoelementos/sangue , Oligoelementos/urinaRESUMO
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 0.15 mg/mm when 167 L of air are analysed.
Assuntos
Poluentes Ocupacionais do Ar/análise , Biguanidas/análise , Desinfetantes/análise , FotometriaRESUMO
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.