ABSTRACT
A reaction of chlorides with trivalent iron and mercuric rhodanide was suggested to be conducted in nonaqueous solvents so as to increase its sensitivity. After some trials the following medium was suggested: 60-70 vol.% acetic acid and 7-15 vol.% hydrochloric acid. Measurements limit -2.5 mg/m, measurements range -2.5-25.0 mg/m.
Subject(s)
Air Pollutants/analysis , Chlorides/analysis , Photometry/methods , Acetates , Acetic Acid , Filtration , Hydrochloric AcidABSTRACT
Out of a set of tested stabilizers used in the photometric detection of sulphur dioxide by fuchs in formaldehyde reactions, trilon B solution was chosen in concentrations 2.5.10(-4)-1.10(-2) M as an absorbent solution and stabilizer. The proposed substitution of natrium tetrachlormercurate by trilon B provided greater stability of sulphur dioxide solution for 7 days and a higher absorbing activity (99.6-100%), avoiding working with highly poisonous substance which would require much time for synthesis.
Subject(s)
Air Pollutants, Occupational/analysis , Chemical Industry/standards , Sulfur Dioxide/analysis , Formaldehyde/pharmacology , Indicators and Reagents/pharmacology , Photometry/methods , Rosaniline Dyes/pharmacology , Sulfur Dioxide/standards , UkraineABSTRACT
In a set of reactions used in photometric lead detection, the arcenaso III and sodium molibdate reaction was chosen for lead control, the measurement level being 0.1 micrograms/cm2 and the measurement range of 0.1-3 micrograms/cm2. The technique is applicable in presence of Fe+2, Fe+3, Al+3, Sn+4, Ni+2, Cr+2, Cr+6, Cd+2, Co+2, Zn+2.
