Preconcentration and determination of nickel (II) and copper (II) ions, in vegetable oils by [TBP] [PO4] IL-based dispersive liquid-liquid microextraction technique, and flame atomic absorption spectrophotometry

被引：36

作者：

Adhami, Khavar ^{[1
]}

Asadollahzadeh, Hamideh ^{[1
]}

Ghazizadeh, Mahdieh ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Chem, Kerman Branch, Kerman 7635131167, Iran

来源：

JOURNAL OF FOOD COMPOSITION AND ANALYSIS | 2020年 / 89卷

关键词：

Metal ions preconcentration; Tetrabutyl phosphonium phosphate ionic liquid; IL-DLLME; Vegetable oils; CLOUD POINT EXTRACTION; WATER SAMPLES; HEAVY-METALS; CHROMATOGRAPHY; MICROEMULSION; CADMIUM; LEAD;

D O I：

10.1016/j.jfca.2020.103457

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The present research is a novel enrichment method based on ionic liquid dispersive liquid-liquid micro-extraction that was combined with flame atomic absorption spectroscopy to determine the concentration of Cu2+ and Ni2+ ions in vegetable oil samples at trace levels. The ionic liquid [TBP] [PO4] and chloroform were used as the extraction and dispersive solvent respectively. Canola oil containing oil-soluble standard of Cu2+ or Ni2+ ions as the model compound was used. Under optimum conditions the linear ranges were 1-100 and 1 - 200 mu g/kg for Cu2+ and Ni2+ respectively with correlation coefficient (R-2) of 0.99. The relative standard deviation (RSD, n = 5) for Cu2+ and Ni2+ at a concentration of 20 mu g/kg was 2.2 % and 3.2 % respectively. The LOD (3 s) and LOQ (10 s) were 0.35 ppb and 1.2 ppb; and 0.77 ppb and 2.57 ppb for Cu2+ and Ni2+ respectively.

引用

页数：6

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