A sample drawn in several phases refers to the selection of a large-sized preliminary sample on which some quick and inexpensive method of measurement is applied,-followed by the drawing of a ...
The author examines sample-preparations methods used in inductively coupled plasma–optimal emission spectroscopy for four test metals. When analyzing for trace metals using inductively coupled plasma ...
The sampling frame for this study was the Twins Early Development Study (TEDS), a large-scale longitudinal study of behavioural development in a representative sample of twins born in 1994, 1995 and ...
Water samples from Mirror Lake, New Hampshire, were concentrated with a transparent filtering funnel fitted with differentsized mesh screening. The commonly used No. 20 (75-μ mesh) plankton netting ...
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