[Non-flame atomic absorption method of the analysis of mercury-containing biological materials].

Julia-2 mercury analyzer is modified. Gasodynamic scheme of the device is altered: water vapors can no longer enter the cuvette, the circulation mode is realized. Equilibrium concentration of mercury vapors is thus attained.

[Potentiometric determination of halide ions in blood].

The authors have studied the possibility of using ion-selective electrodes Kritus (Czecho-Slovakia) for analysis of whole blood and serum without preliminary labor-consuming sample preparation. Chloride ions were found to be detectable in the blood serum by potentiometric titration with Ag nitrate solution making use of a pAg-CE-pF-CE pair in ethanol, acetone, or acetic acid medium. Active concentrations of whole blood and serum bromide- and iodide ions may be measured by direct potentiometry with pBr-CE-pF-CE and pI-CE-pF-CE pairs, respectively, against the background of 1 M potassium (or sodium) nitrate solution providing the constancy of solution ionic strength.