Quantitative reflectometry-II Precision and interferences.
A detailed assessment of the precision of direct reflectance measurements has been made, using commercially available test-strips for nickel. The overall relative precision is 3.2-4.6% for the concentration range 10-100 ppm. The effect of interfering ions has been studied and the mechanism of interference discussed in terms of diffusion. Non-commercial test-strips have been prepared and compared with the commercial product.
Kealey
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School of Chemical and Physical Sciences, Kingston Polytechnic, Kingston-upon-Thames, Surrey, England.