Guidelines For Calibration In Analytical Chemistry Part 2. Multispecies Calibration (Iupac Technical Report) Abstract: Calibration in analytical chemistry refers to the relation between sample domain and measurement domain (signal domain) expressed by an analytical function x = fs(Q) representing a pattern of chemical species Q and their amounts or concentrations x in a given test sample on the one hand and a measured function y = f(z) that may be a spectrum, chromatogram, etc. Simultaneous multispecies analyses are carried out mainly by spectroscopic and chromatographic methods in a more or less selective way. For the determination of n species Qi (i = 1, 2…n), at least n signals must be measured which should be well separated in the ideal case. In analytical practice, the situation can be different. 附件
Use Of The Terms “Recovery” And “Apparent Recovery” In Analytical Procedures(Iupac Recommendations 2002)Abstract: The terms recovery and apparent recovery are recommended to avoid confusion caused by the use of the term recovery to cover two distinct situations. These situations deal with: (a) the yield of a preconcentration or extraction stage of an analytical process (where recovery is recommended) and (b) the quantity observed value/reference value, obtained using an analytical procedure that involves a calibration graph (where apparent recovery is recommended).
Selectivity in analytical chemistry (IUPAC Recommendations 2001) Abstract: The correct use of the term “selectivity” and its clear distinction from the term “specificity” are discussed. A definition of selectivity is given, and it is recommended that the use of this term be promoted and that the use of the term “specificity” be discouraged.
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