CONTINUOUS DETERMINATION OF Zn, Fe, Mn, Cu, Pb, AND Cd WITH POLAROGRAPHIC CATALYTIC METHOD
- VernacularTitle:极谱催化波法连续测定锌、铁、锰、铜、铅、镉
- Author:
Zhenhua HE
- Publication Type:Journal Article
- Keywords:
trace element Zn Fe Mn Cu Pb Cd Polarographic catalytic method
- From:
Acta Nutrimenta Sinica
1956;0(01):-
- CountryChina
- Language:Chinese
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Abstract:
The contents of 6 trace elements in "Ginseng Three-treasure" oral liquid and biological sample were determined with polarographic catalytic method by use of the solution of ethylenediamine and 8-hydroxyquinoline (pH11.50-12.00) as medium. The peak potentials of Zn, Fe, Mn, Cu, Pb,and Cd were -1.45V,-1.66V,-1.7GV, -0.61V,-0.74V, and-0.94V, respectively and the peak heihgts were linearly proportional to the concentration over a range of 0-5ppm,0-5ppm, 0-5ppm, 0-3ppm, 0-4ppm,and 0-6ppm respectively. The lower limit for determination of all the six trace elements was 2ppb. The recovery rates were 98.7%, 103.3%, 104.5%, 104.8%, 95.0% and 95.0% and the coefficient of variation was 5.8-10.0%. This method was accurate and suitable for operation.
