These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Selective cloud point extraction for the determination of cadmium in food samples by flame atomic absorption spectrometry.
    Author: Xiang G, Wen S, Wu X, Jiang X, He L, Liu Y.
    Journal: Food Chem; 2012 May 01; 132(1):532-6. PubMed ID: 26434327.
    Abstract:
    A new cloud point extraction (CPE) procedure for preconcentration of cadmium prior to the determination by flame atomic absorption spectrometry (FAAS) was developed. The method is based on the fact that cadmium could form hydrophobic ion-associated complex in the presence of iodide and methyl green (MG), and the hydrophobic ion-associated complex could be extracted into surfactant-rich phase. The main factors affecting CPE procedure, such as pH, concentration of KI, MG and surfactant, equilibrium temperature and incubation time, sample volume were investigated. Potential interference from co-existing ions was largely eliminated as most of co-existing ions can not form extractable ion-associated complex with iodide and MG. Under the optimum conditions, the limit of detection (3σ) and limit of quantity (10σ) were 0.90ngmL(-1) and 3.0ngmL(-1) for cadmium, respectively, and relative standard deviation was 4.2% (c=50ngmL(-1), n=7). The proposed method was successfully applied to determination of cadmium in the certified reference rice sample (GBW08510) and food samples with satisfactory results.
    [Abstract] [Full Text] [Related] [New Search]