Simple spectrophotometric flow injection system with an in-valve minicolumn for enhancement during the determination of chromium(III) using EDTA.
A simple spectrophotometric flow injection (FI) procedure for the determination of Cr(III) using ethylenediaminetetraacetic acid (EDTA) was developed. An FI system with a column packed with Amberlite IR-120(H) was employed for sample pretreatment. This leads to the possibility of a single standard calibration. A linear calibration in a range of 10-27 microg Cr(III) was obtained with a detection limit of 1 microg Cr(III) and RSD of 2% (18 microg Cr(III), n=12). The proposed procedure was applied for determination of Cr(III) in leachate and dietary supplement samples. The results agreed with those obtained by the standard methods.
Lapanantnoppakhun
Somchai
S
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. somchail@chiangmai.ac.th
Kasuwas
Supharphorn
S
Ganranoo
Lucksagoon
L
Jakmunee
Jaroon
J
Grudpan
Kate
K
D002857:Chromium / Q000032:analysis*; D004492:Edetic Acid / Q000737:chemistry*; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods*; D044085:Microfluidics / Q000295:instrumentation* / Q000379:methods*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods
D002857:Chromium; D004492:Edetic Acid