Water analysis

Pneumatoamperometric determination of parts-per-billion dissolved species by gas evolving reactions

“…These problems can be minimized by using a high concentration of acid and carrying out Reaction 3 above room temperature. Optimization of competing requirements led to using 1 X 1CT4 M L in 4 M HC104 and carrying the reaction out at 30 °C.…”

“…The high toxicity and low allowable limits for these and other toxic species illustrate the need for sensitive analytical methods. Numerous articles describing methods for these and related analyses have appeared in recent years and are reviewed biannually (2)(3)(4).…”

Water analysis

“…Thioacetamide is added to the sample solution to remove the interference from high concentrations of monochloramines. An amperometric titration apparatus was constructured by Payne (13L) to determine chlorine in water at a detectable limit of [5][6][7][8][9][10] This method can also detect bromine and can differentiate between bromine and chlorine.…”

Separation and determination of volatile hydrides by gas chromatography with a gold gas-porous electrode detector

“…For those elements forming volatile hydrides, the use of hydride generation for analysis has gained wide usage due to the improved sensitivities achieved over direct measurement of the dissolved species. The development and application of hydride generation methods for atomic spectroscopic analysis has been recently reviewed (2), and numerous applications of hydride methods have appeared in review articles (3,4). The application of hydride generation for determination of a number of elements was summarized in a recent article (5).…”