Microelement Contents of Locally Produced and Imported Wheat Grains in Yemen

In the last few decades, wheat-based products have received considerable attention in view of their potential role in transporting of microelements into the human diet. In Yemen, bread is the staple food, produced in different kinds from local and imported wheat. Most of it is not subjected to microelemental analysis. The objective of this study is to determine quantitatively the microelement such as Fe, Cu, Mn, Zn, Co, Cd and Pb in samples of wheat grains produced locally from different cultivated regions in Yemen as well as those imported from USA and Austria. Flame atomic absorption spectrophotometry was used for analysis. The results show that the contents of the microelements in the studied samples are generally within the permissible levels except cadmium. The samples collected from middle altitude and eastern plateau the cadmium is above the permissible level

Microelement Contents of Locally Produced and Imported Wheat Grains in Yemen

In the last few decades, wheat-based products have received considerable attention in view of their potential role in transporting of microelements into the human diet. In Yemen, bread is the staple food, produced in different kinds from local and imported wheat. Most of it is not subjected to microelemental analysis. The objective of this study is to determine quantitatively the microelement such as Fe, Cu, Mn, Zn, Co, Cd and Pb in samples of wheat grains produced locally from different cultivated regions in Yemen as well as those imported from USA and Austria. Flame atomic absorption spectrophotometry was used for analysis. The results show that the contents of the microelements in the studied samples are generally within the permissible levels except cadmium. The samples collected from middle altitude and eastern plateau the cadmium is above the permissible level

Voltammetric determination of Phosalone and Carbophos pesticides using a modified carbon-paste electrode

A procedure for the selective determination of Phosalone and Carbophos in their alkaline hydrolyzates using a carbon-paste electrode modified with cobalt(II) 2,2′-dipyridylate was developed. The preconcentration of pesticides is based on their adsorption on the surface of the above electrode with the resulting formation of electroactive mixed-ligand Co(II) complexes. The oxidation current of the resulting mixed-ligand chelate allows 1.2 × 10-9 M Carbophos and 5.5 × 10-9 M Phosalone to be detected. Dithiocarbamates, which form no mixed complexes with the modifier under the experimental conditions, cause no interference. © 1998 MAEe cyrillic signK Hayκa/Interperiodica Publishing

Voltammetric determination of Phosalone and Carbophos pesticides using a modified carbon-paste electrode

A procedure for the selective determination of Phosalone and Carbophos in their alkaline hydrolyzates using a carbon-paste electrode modified with cobalt(II) 2,2′-dipyridylate was developed. The preconcentration of pesticides is based on their adsorption on the surface of the above electrode with the resulting formation of electroactive mixed-ligand Co(II) complexes. The oxidation current of the resulting mixed-ligand chelate allows 1.2 × 10-9 M Carbophos and 5.5 × 10-9 M Phosalone to be detected. Dithiocarbamates, which form no mixed complexes with the modifier under the experimental conditions, cause no interference. © 1998 MAEe cyrillic signK Hayκa/Interperiodica Publishing

Le Courrier des spectacles, ou Journal des théâtres

17 juillet 18031803/07/17 (N2324)