International Journal of Analytical Chemistry / 2011 / Article / Tab 4

Research Article

Direct Zinc Determination in Brazilian Sugar Cane Spirit by Solid-Phase Extraction Using Moringa oleifera Husks in a Flow System with Detection by FAAS

Table 4

Comparison of methods for determination of zinc.

SampleSorbentChelating agent/modifierEluentPFSV (mL)LOD (μg L−1)Linear range (μg L−1)DetectionRef.

Brazilian cachaça 6.0 0–4000FAAS[21]
Sugar1025–200ASV[22]
Water, hair, urine and salivaAlizarin Red SAluminaHNO3144250.21–100FAAS[23]
SeawaterSilica gelDPTHCitric acid/tartaric acid8.81.72–500ICP-OES[24]
WaterAmberlite XAD-2oVTSCHCl14010001020–50FAAS[25]
No dataXAD-78-BSQHCl101.65–200Spectrophoto-metry[26]
Sea waterDowex 1X8-50ARSHNO3550–20023No dataFAAS[27]
Saline matricesAmberlite XAD-7ARSHNO3505029250–2000FAAS[28]
WaterSiO2/Al2O3/
Nb2O5
PANHNO352.6202.330–180Spectrophoto-metry[29]
Brazilian cachaça M. oleifera husksHNO310.9101.92–50FAASThis work

PF = preconcentration factor; SV = sample volume; LOD = limit of detection; PAN = (1-(2-piridylazo)-2-naphtol); DPTH = 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide; ARS = Alizarin red S; OVTSC = vanillin thiosemicarbazone; 8-BSQ = 8-(benzenesulfonamido)quinoline; FAAS = flame atomic absorption spectrometry; ASV: anodic stripping voltammetry, ICP-OES = inductively coupled plasma optical emission spectrometry.

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