6533b824fe1ef96bd127fe96
RESEARCH PRODUCT
The generalized H-point standard-additions method to determine analytes present in two different chemical forms in unknown matrix samples. Part II. Cr(vi) determination in water samples by absorption spectrophotometry
Francisco Bosch-reigF. Blasco-gómezPilar Campíns-falcóLuis Antonio Tortajada-genarosubject
AnalyteAbsorption spectroscopyChromate conversion coatingChemistryAnalytical chemistryBiochemistryAnalytical ChemistryChemometricsAbsorbanceMatrix (mathematics)Standard additionElectrochemistryEnvironmental ChemistryQuantitative analysis (chemistry)Spectroscopydescription
The generalized H-point standard-additions method (GHPSAM) is used in order to obtain the total Cr(VI) and chromate concentration in water samples whose matrices are completely unknown. Moreover, a new methodology, which is a modification of the GHPSAM, is proposed for the simultaneous determination of the two major chemical forms of Cr(VI) present in the sample. The method is based on the location of spectral intervals where the behaviour of the interferent absorbance can be considered as linear. From these intervals, the analyte concentration free from bias error can be estimated. Spiked samples of dig and harbour water measured in the UV–visible spectral region have been tested to check the background signal cancellation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 | The Analyst |