สถานที่ตีพิมพ์ : Oriental Journal of Chemistry, 2018, 34(1): 188-195.
รายละเอียด : A simple and selectively visual detection of Cu2+ and Al3+ using Hibiscus rosa-sinensis Linn extract in aqueous solution was investigated for the first time. It was found that positive visual detections of Cu2+ and Al3+ gave their color change at pH 7. The selectivity of this method was examined using two masking agents, sodium fluoride (NaF) and dimethylglyoxime (DMG). The method exhibits good selectivity when NaF and DMG were used for the determination of Cu2+ and Al3+, respectively. The flower extract could be employed for Cu2+ and Al3+ detection at the lowest concentration of 0.5 mg/L and 1.0 mg/L, respectively. The results from naked-eye detection were also evaluated by comparing with those of using inductively coupled plasma - atomic emission spectrometry (ICP-AES),
