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The 33 parameters that affect accuracy of quantitative analysis by X-ray powder diffractometry can be grouped as (1) Instrumental or systematic, (2) Inherent properties of the analyte, or (3) Parameters related to preparation and mounting of powders. The effect of each on diffraction intensity is summarized. An optimal value or range is given for instrumental parameters. Evaluation of inherent...
An overview of the sampling of polar pesticides from water samples is presented. The sampling plans and strategies for different types of waters such as river, well and seawater samples are discussed. In situ preconcentration methods, involving on-line techniques or direct measurement methods are mentioned as alternatives to conventional techniques. Attention is devoted to the influence of organic...
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