Andere Kunden interessierten sich auch für
![Some Complexes of N-Aryl Furfural Nitrones with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) Chlorides]( "Some Complexes of N-Aryl Furfural Nitrones with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) Chlorides")
Some Complexes of N-Aryl Furfural Nitrones with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) Chlorides9,99 €![Schiff base Cu (II) and Pd (II) complexes and their applications]( "Schiff base Cu (II) and Pd (II) complexes and their applications")
Schiff base Cu (II) and Pd (II) complexes and their applications23,99 €![Optical proprieties of ZnS : Cu/ZnS]( "Optical proprieties of ZnS : Cu/ZnS")
Optical proprieties of ZnS : Cu/ZnS29,99 €![Studies On Cu(II) & Ni(II) Complexes With Some N And N,O Donor Ligand]( "Studies On Cu(II) & Ni(II) Complexes With Some N And N,O Donor Ligand")
Studies On Cu(II) & Ni(II) Complexes With Some N And N,O Donor Ligand50,99 €![Square Pyrimidal Cu(II) Complexes And Their Biological Evaluation]( "Square Pyrimidal Cu(II) Complexes And Their Biological Evaluation")
Square Pyrimidal Cu(II) Complexes And Their Biological Evaluation46,99 €![Synthesis and Characterization Of Ni & Cu Complexes]( "Synthesis and Characterization Of Ni & Cu Complexes")
Synthesis and Characterization Of Ni & Cu Complexes32,99 €![PREPARTION OF Cu(II) and La(III) NEW SCHIFF BASE METAL COMPLEXES]( "PREPARTION OF Cu(II) and La(III) NEW SCHIFF BASE METAL COMPLEXES")
PREPARTION OF Cu(II) and La(III) NEW SCHIFF BASE METAL COMPLEXES44,99 €
A simple spectrophotometric method is presented for the rapid determination of Zn using diethyldithiocarbamate(DDTC) as a new spectrophotometric reagent in a acidic (0.001 M H2SO4) aq. solution. Complex formed by Cu with DDTC is more stable than Zn. The method is based on the quantitative replacement of Zn(II) with Cu(II) from its DDTC-complex and subsequent measurement of Cu(DDTC)2 at 435 nm ( max). Therefore, simultaneous determination of both Cu and Zn has been proposed. The average molar absorptivity of the method for Zn determination was found to be 2.86 × 105 L. mol.-1 cm.-1. The reaction is instantaneous & the absorbance remains stable for over 72 h. The Sandell s sensitivity was found to 3.076 ng cm-2 of Zn. Linear calibration range was obtained of 0.02-14 µg mL-1 for Zn & 0.02-12 µg mL-1 for Cu. The stoichiometric composition of chelate is 1:2 (Zn/Cu : DDTC). The method is characterized by a detection limit of 0.29 µg mL-1 for Zn & 0.23 µg mL-1 for Cu. Large excess of over 50 cations, anions & complexing agents do not interfere in the determination. The method was successfully applied to a number of environmental, biological, food, pharmaceutical & fertilizer samples.