a new method for the determination of trace copper(ii) in food samples by cloud point extraction(cpe) combined with flame atomic absorption spectrometry(faas) is presented and evaluated. the method is based on the fact that hydrophobic complex of copper(ii) with sodium diethyldithiocarbamate (ddtc) was formed at ph 6.0 and subsequently the hydrophobic complex was extracted into surfactant-rich ...

Since matcha includes all leaf parts seems desirable to measure contents of elements before and after digestibility. This paper examines in vitro digestibility, mineral trace element digestion their leaching ability during ice tea processing. Digestibility values measured enzymatically reached 71.3 %. High K, Mg, Mn, Ca, Fe Zn were recorded by FAAS/ETAAS. Interestingly, concentrations non-diges...

We evaluated the effects of different oxidation levels lipids on protein degradation and biogenic amines (BAs) formation during Sichuan-style sausages processing. Lipids with varying degrees were obtained through storage at temperatures added as raw materials sausages, followed by analyses lipid oxidation, degradation, amine content, other indicators. During processing, increasing degree conten...

The heavy metals (Cd, Cr, Ni, Pb, Zn, Cu, Fe, Mn) content of some edible wild mushrooms (Amanita caesarea, Amanita rubescens, Amanita vaginata, Amanita spissa) and soil samples, of ten sites from Dambovita county Romania, were analyzed. Elements concentrations were determined by Flame Atomic Absorption (FAA) spectrometry and Energy Dispersive X-ray spectrometry (EDXRF) in 40 samples of Amanita ...

Cloud point extraction (CPE) has been used for the preconcentration of cadmium, after the formation of a complex with 1, 5-bis(di-2-pyridylmethylene) thiocarbonohydrazide (DPTH), and further determination by flame atomic absorption spectrometry (FAAS) using Triton X-114 as surfactant. The main factors affecting the CPE, such as concentration of Triton X-114 and DPTH, pH, equilibration temperatu...

a simple, highly sensitive, accurate and selective method for determination of trace amounts of pb(ii) in water samples is presented. a novel graphene oxide with covalently linked porphyrin solid-phase extraction adsorbent was synthesized by covalently linked porphyrin onto the surfaces of graphite oxides. the stability of a chemically (go-h2p) especially in concentrated hydrochloric acid was s...

a novel and selective method for the fast determination of trace amounts of cu(ii) ions in water samples has been developed. the procedure is based on the selective formation of cu(ii) at optimum ph by elution with organic eluents and determination by flame atomic absorption spectrometry. the method is based on complex formation on the surface of the envi-18 disktm disks modified schiff base-ch...