LGC: Analytical method: Quantitative Chromium Species Measurements in Clean and Effluent Waters
The objective ofthe study is to investigate the feasibility ofa method based on ion
pair/chelation reversed phase HPLC-ICP-MS for the reliable quantification ofboth
Cr(VI) and Cr(III) species in water by external calibration. This study follows fi-om a
previous study- Chromium Specialion in LGC6177 Landfill Leachates Initial
identification. 1 Unfortunately, BCR CRM-544 (lyophilised water) is no Ionger
available therefore, a set of AQUACHECK proficiency testing scheme solutions
(clean and waste waters) were analysed to evaluate the accuracy of the method.
External calibration results were compared to those obtained using double spike
IDMS calibration. An estimation of the Iimits of detection for the method was made
and Cr (III) spike recovety experiments were also perfmmed.