APPENDIX III. Harmonized IUPAC Guidelines for the Use of Recovery Information on Analytical Measurement

(Recommended to the Commission for adoption by reference)

The Harmonized IUPAC Guidelines for the Use of Recovery Information in Analytical Measurement are recommended for adoption for Codex purposes by the 24^th Session of the Commission with the exception of the first two sentences of Recommendation 1[22].

Recommendation 1 of the IUPAC Guidelines should therefore read as follows:

It is of over-riding importance that all data, when reported, should (a) be clearly identified as to whether or not a recovery correction has been applied and (b) if a recovery correction has been applied, the amount of the correction and the method by which it was derived should be included with the report. This will promote direct comparability of data sets. Correction functions should be established on the basis of appropriate statistical considerations, documented, archived and available to the client.

Reference

Harmonised Guidelines for the Use of Recovery Information in Analytical Measurement (Pure Appl. Chem., Vol. 71, pp. 337 - 348, 1999)

[22] “Quantitative analytical results should be corrected for recovery unless there are specific reasons for not doing so. Reasons for not estimating or using correction factors include the situations where (a) the analytical method is regarded as empirical, (b) a contractual or statutory limit has been established using uncorrected data, or (c) recoveries are known to be close to unity. However,.....”