Water analysis

High sensitivity carbon dioxide analyzer

“…C02(aq) --co2(g) Cases examined have been 8 (NaOH + Na2COs), 7 (Na2C03), 6 (Na2CÜ3 + NaHCOs), and an analytical case with characteristics of cases 6, 5, 4 at the same time (tap water). The other cases are comprised in the preceding ones.…”

“…This set of programs has a built-in safeguard against the calculation of negative molar absorbtivities during any stage of the calculation, a strategy also adopted by Nagano and Metzler (5). Another general method, utilizing potentiometric data, by Sabatini and Gans (6,7) employs the Davidon-Fletcher-Powell (8, 9) modification of the Gauss-Newton iterative method. These authors have commented on the unreliability of SCOGS (10) and we will discuss our experiences with this program later in this paper.…”

Spectrophotometric determination of trace quantities of iodide after separation from large quantities of bromide, chloride, or sulfate by solvent extraction

“…The selective determination of small quantities of iodide in the presence of large quantities of the other anions has been the subject of much investigation. Much of the recent work in this field has been reviewed (1)(2)(3)(4)(5). Recent effort in this area has involved the development of selective methods of analysis which do not involve prior separation of iodide or methods involving rapid separation which require a minimum of manipulation.…”

Water Analysis

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This biennial review of methods of water analysis, the fifteenth in a series that began in 1949, covers the literature from October 1970 through September 1972. It follows the plan of the previous reviews, the most recent of which appeared in Analytical Chemistry for April 1971 (12).The Water Pollution Control Federation publishes, annually, a review of the literature on water pollution control which includes a section on analytical methods. Their 1970 review by Williams (39), Doughty, (9), and Carlton, Walters, and Whittle (8) includes 90 references and covers such topics as COD, cations, anions, spectrophotometric, noninstrumental, automated, monitoring, and radiochemical techniques.

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