Quantitative reflectometry-I Principles and scope.
The technique of quantitative reflectometry is critically investigated, the model being the quantitative determination of nickel in aqueous media. Direct reflectance measurements can be made on commercially available nickel test-strips which develop a pink or red colour in the presence of nickel ions. Relative precisions at the 10 and 50 ppm levels are 2.3-3.6%.
Kealey
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School of Chemical Science and Technology, Kingston Polytechnic, Kingston-upon-Thames, Surrey, U.K.