A METHOD OF DETERMINING THE CONTENT OF A COMPONENT IN A FLUID SAMPLE AND AN APPARATUS THEREFOR

WIPO Patent Application WO2001004612

A3

A method of quantitative determining the content or concentration of a component in a fluid sample by IR analysis, the method comprising the following steps: a) directing one or more IR light beams through each of a number, n, of different parts of a fluid sample, the IR light including at least one wavelength within a waveband which the component absorbs, b) for each of the n parts of the sample, detecting the IR light having passed through the respective part of the sample, c) obtaining, for each of the parts, at least one value on the basis of the detected IR light, the value representing information from which the content or concentration may be estimated, d) calculating at least two statistical parameters, such as statistical moments, eg. a mean value and a standard deviation, characteristic of a statistical distribution of the obtained values, and e) estimating or determining the content or concentration of the component on the basis of the at least two statistical parameters. Thereby the content may be determined fairly accurate even through the instrument is simple and the measured sample is not homogenised. The obtained accuracy depends on the number of repetitive measurements on each sample. A better accuracy may be obtained by increasing the number of measurements.

JUHL HENRIK VILSTRUP (DK)

PCT/DK2000/000370

July 19, 2001

July 06, 2000

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FOSS ELECTRIC AS (DK)
JUHL HENRIK VILSTRUP (DK)

G01N21/3577; G01N21/359; G01N33/06; (IPC1-7): G01N21/35; G01N33/06

WO1992017767A1

1992-10-15

EP0404207A2	1990-12-27
EP0487733A1	1992-06-03
GB2150325A	1985-06-26
US4055752A	1977-10-25

XP002901454

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