| Autor: |
Sakurai, Sadato, Shirai, Hideko, Niki, Eiji |
| Zdroj: |
Bulletin of the Chemical Society of Japan; August 1973, Vol. 46 Issue: 8 p2402-2405, 4p |
| Abstrakt: |
In order to increase polarographic precision and sensitivity, the oscillopolarographic current was digitized and stored in a 100-channel pulse-height analyzer (PHA) operated in the multi-sealer mode (MS mode). An oscillopolarograph which could sweep the DC potential rapidly was combined with the PHA. The digitized oscillopolarographic current was repeatedly stored in the PHA, so that the statistical noise was reduced and the signal-to-noise ratio of the oscillopolarographic current was increased. Also, the drift due to the change in the experimental conditions was removed effectively by shortening the measurement time. Therefore, precision was efficiently improved by means of accumulation. The relative deviation was 0.25% at the concentration of the 5×10−7M cadmium ion. As an example of the application, trace amounts of copper, lead, and cadimum in 99.99% indium metal were analyzed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
