Comment on "an alternative minimum level definition for analytical quantification."

Article Abstract:

The proposed statistical procedure Alternate Minimum Level (AML) for determining quantitation levels has many flaws such as the lack of critical definitions and components in the basic statistical model and the use of statistical theory that has not been justified. AML, which is just based on a collection of data from many laboratories unreliable, can not replace the Environmental Protection Agency's (EPA) Minimum Level and serve as a censoring level for regulatory compliance. It is highly unreliable and inconsistent with the EPA's mandate to protect human health and the environment.

Environmental Management, Environmental aspects, Environmental indexes, United States. Environmental Protection Agency, Environmental policy, Public opinion, Statistics, Statistics (Data)

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Analytical evaluation of immobilization of heavy metals in cement matrices

Article Abstract:

An evaluation of the method of Cd, Pb, Zn and Cr immobilization in alkali-activated slag cement mortars and Portland cement mortars was conducted. Findings revealed that differential pulse anodic stripping voltammetry allows the determination of trace amounts of Cd, Pb and Zr in extract solutions produced on leaching the metals from different cementitious materials and the degree of immobilization in mortars. The spectrophotometric method, on the other hand, is ideal for routine Cr determination in leaching solutions due to its simplicity and sensitivity.

Analysis, Leaching, Cement, Cements (Building materials), Heavy metals

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What's new in analytical instruments: PITTCON '93

Article Abstract:

Several new analytical instruments were exhibited at the 1993 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy in Atlanta, GA. The most evident trend in the exhibit was the large number of new supercritical fluid extraction equipment. In addition, there were new air monitoring equipment and instruments which used inductively coupled plasma.

Reports, Equipment and supplies, Chemistry, Analytic, Analytical chemistry, Supercritical fluid extraction, Pittsburgh Conference and Exposition on Analytical Chemistry and Applied Spectroscopy

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