Spectrophotometric determination of cyanide, sulfide, and sulfite with mercuric chloranilate

Simultaneous determination of free sulfide and cyanide by ion chromatography with electrochemical detection

“…Ion-selective electrodes (4-8) have been widely used for separate determination of sulfide or cyanide but unfortunately respond to both species. Similar interference problems arise with many amperometric, spectrophotometric, and other methods (9)(10)(11).…”

Mercuric iodate as an analytical reagent. Spectrophotometric determination of certain anions by an amplification procedure employing the linear starch iodine system

“…The procedure is simple, reasonably fast, and requires a minimum of chemicals and manipulation. Reagents used are stable and impurities are not troublesome, as is sometimes the case with mercuric chloranilate (21). The color formed is also stable for a matter of hours.…”

Ultraviolet spectrometry

“…Phosphate ion has been determined as the phosphomolybdic acid in a mixed aqueous-organic solvent system (186). A spectrophotometric reaction-rate method has been utilized for the determination of silicate as the 8-12-molybdosilicic acid (164).…”

“…Cyanide was determined by measuring the absorbance of the thiol anion obtained by reacting cyanide ion with disulfides (165). The sensitivity of the mercuric chloranilate procedure for the determination of cyanide, sulfite, and sulfide was improved by measurement a t 330 nm (164). Sulfide and sulfhydryl can also be determined by reaction with various thiopyridines followed by measurement in the range of 275-340 nm (144,166).…”