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Division 2.3.4.1 Infra-red detection

United Kingdom

Original text. Later amendments are not shown.

Absorption maximum: This shall be in the wavenumber range 4000-500 cm-1.

Intensity of absorption: This shall not be less than either:

(a)

a specific molar absorbance of 40 with respect to peak base line; or

(b)

a relative absorbance of 12,5 % of the absorbance of the most intense peak in the region 4000-500 cm-1

when both are measured with respect to zero absorbance, and 5 % of the absorbance of the most intense peak in the region 4000-500 cm-1 when both are measured with respect to their peak base line.

Note: Although adequate peaks according to (a) may be preferred from a theoretical point of view, those according to (b) are easier to determine in practice.

The number of peaks in the infrared spectrum of the analyte whose frequencies correspond with an adequate peak in the spectrum of the calibration standard, within a margin of ± 1 cm-1 is determined.

Notes on Annex I

Textual amendments

F1

Replaced by virtue of 2003/181/EC: Commission Decision of 13 March 2003 amending Decision 2002/657/EC as regards the setting of minimum required performance limits (MRPLs) for certain residues in food of animal origin (Text with EEA relevance) (notified under document number C(2003) 764)