Nano-alumina coated with sodium dodecyl sulfate and modified with 4-(2-Pyridylazo) resorcinol for extraction of heavy metals in different matrixes

Add time:07/24/2019    Source:sciencedirect.com

A green, novel and efficient solid phase extraction method based on the use of nano-alumina (nano-Al2O3) coated with sodium dodecyl sulfate (SDS) and modified with 4-(2-Pyridylazo) resorcinol (PAR) as a new adsorbent was developed for separation and preconcentration of trace amounts of Ni, Pb, Cu and Zn ions prior to determination by inductively coupled plasma-optical emission spectrometry (ICP-OES). Under the optimum conditions (eluent: HNO3, 4.0 mL, 3.0 mol L−1; adsorbent: 0.8 g of nano-Al2O3, 40 mg of SDS, 8.6 mg of PAR; and sample: pH 6, flow rate 2.0 mL min−1), adsorption capacity of nano-Al2O3-SDS-PAR, enrichment factors and limits of detection for the analytes were 8.7–12.9 mg g−1, 125–250, and 0.12–0.71 μg L−1, respectively. The proposed method presented excellent repeatability with relative standard deviations less than 1.6% (n = 10), and calculated calibration curves gave good level of linearity with correlation coefficient values between 0.989 and 0.999. Finally, the feasibility of the method was evaluated by extraction and determination of Ni, Pb, Cu and Zn ions in rice seed, apple juice, coriander, lettuce and tap water samples.

We also recommend Trading Suppliers and Manufacturers of 4-(2-PYRIDYLAZO)RESORCINOL (cas 13311-52-9). Pls Click Website Link as below: cas 13311-52-9 suppliers

Prev:Molar absorption coefficients and stability constants of metal complexes of 4-(2-pyridylazo)resorcinol (PAR): Revisiting common chelating probe for the study of metalloproteins
Next:An inorganic–organic hybrid optical sensor for heavy metal ion detection based on immobilizing 4-(2-pyridylazo)-resorcinol on functionalized HMS)