A METHOD OF DETERMINING THE CONCENTRATION OF CYANIDE IN A SAMPLE

A METHOD OF DETERMINING THE CONCENTRATION OF CYANIDE IN A SAMPLE

A method of determining the proportion of cyanide in a sample, comprising the following steps:(i) Add the sample to be analysed to a sensor molecule that is selected from cobryrinic acid hepta C1-4 alkyl esters of the Formula Iin which X is CN, R3 is H, and R1 and R2 are OCH3;(ii) Subject the sample...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KIRCHGÄSSLER, Benedikt Fabian Quirin, SONNAY, Marjorie
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:A method of determining the proportion of cyanide in a sample, comprising the following steps:(i) Add the sample to be analysed to a sensor molecule that is selected from cobryrinic acid hepta C1-4 alkyl esters of the Formula Iin which X is CN, R3 is H, and R1 and R2 are OCH3;(ii) Subject the sample to UV-vis spectroscopic analysis in the range 450-700 nm;(iii) Determine the free cyanide concentration from the equation (i)C=(A−0.058)/0.104  (i)in which C is the free cyanide concentration and A isA=A581/A527the ratio of the absorbances at 581 and 527 nm, the equation (i) having been derived from a calibration curve that is a plot of A ratios calculated at 0-1 mg/L CN− with a constant 46 nmol of sensor compound.The method provides a particularly accurate assessment of cyanide concentration in an unknown sample.