APPARATUS FOR DETECTING SODIUM IN A LIQUID

摘要

There is provided an apparatus for detecting sodium in a liquid. A concentration of a very small amount of sodium can be repeatedly and accurately measured by correcting baseline fluctuation and sodium concentration variation due to temperature variation on the basis of measured temperature and minimizing noise influence on the concentration measurement. According to the apparatus for detecting sodium in a liquid, the apparatus for detecting sodium in a liquid can accurately and repeatedly measure a concentration of a very small amount of sodium by minimizing noise and temperature variation effects on concentration measurements to ensure measurement accuracy of sodium concentration and the stability of a baseline as a measurement reference.

主权项

1. An apparatus for detecting sodium in a liquid comprising:
a sodium detecting unit that detects concentration of sodium in a liquid using a plurality of voltages; a temperature-signal processing unit that measures a temperature of the sodium detecting unit; a low-noise amplifying unit that amplifies the difference between the plurality of voltages detected by the sodium detecting unit with low noise; a filtering and amplifying unit that amplifies the low-noise signal output from the low-noise amplifying unit up to a required level and filters the amplified low-noise signal; and a signal-processing and controlling unit that calculates the concentration of the sodium using the low-noise signal received from the filtering and amplifying unit and corrects the calculated concentration of the sodium on the basis of the temperature measured by the temperature-signal processing unit by referring to electrode voltages for a standard solution measured at several temperatures and stored in a memory.