Determination of Trace Cd in Alcoholic and Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Abstract

A cloud-point extraction (CPE) process using the nonionic surfactant, Triton X-114 to extract Cd(II) ions from aqueous solutions was investigated. The method is based on the ion-pairing reaction of Cd(II) with Victoria blue B (VBB + ) in presence of excess iodide at pH 4.0 and extraction of the complex formed. The chemical variables affecting CPE efficiency were studied, and the analytical characteristics of the method were obtained. The calibration curves were obtained in the ranges of 1.0-30 and 10-500 µg/L for Cd(II) ion with the detection limits of 0.34 and 3.8 µg/L at 608 and 634 nm, respectively. The selectivity study was also tested. The precision (N: 5, 25 µg/L) was 2.85% relative standard deviation. The results obtained for two certified reference samples were in a good agreement with the certified values. The method was successfully applied to the determination of Cd(II) in beverage samples.Brought to you by | MIT Libraries Authenticated Download Date | 5/10/18 11:53 PM

Determination of low levels of Cd(ii) in cosmetic products by spectrophotometry after separation/preconcentration with cloud point extraction

“…Also, the method had a lower detection limit than those of atomic and molecular spectrometric methods aer preconcentration with a biosorbent and VALLME from different matrices including CPE at 638 nm. 35,40,41 As a result, reasonable sensitivity improvement and comparable detection limit have been achieved when compared to previously reported studies in the literature, 34,[36][37][38][39][42][43][44] using CPE/spectrophotometry. So, it can locally be considered as a useful analytical tool for accurate and reliable monitoring of trace Cd(II) in cosmetic products.…”

Simple, Rapid, and Highly Sensitive Colorimetric Sensor Strips from a Porous Cellulose Membrane Stained with Victoria Blue B for Efficient Detection of Trace Cd(II) in Water

“…Therefore, it is reasonable to develop a high purity cellulose membrane-based colorimetric sensor for the detection of hazardous materials. The previous reports revealed a strong ion-pairing reaction between VBB + and [CdI 4 ] 2– formed an ion-associate complex. , VBB + combined protons in different acidity media and presented a cationic form in solution . The hydroxyl in the CM combined with VBB to form (CMVBB) + .…”

Separation and Micro Determination of Zinc(II) and Cadmium(II) in Food Samples Using Cloud Point Extraction method

“…For this work, we also acquired a low detection limit and higher preconcentration factors. Zn(II) Cd(II) The characteristics of the employed methodology are compared to the previously published techniques of the Triton X-114 micellar system (CPE) for metal determination with various systems [34][35][36][37][38][39][40][41], with the findings shown in Table 4. According to the analysis, the produced application has a wide dynamic range, low detection and quantity limits, and a higher preconcentration factor.…”