Abstract:

This paper presents a rapid method for detecting the salt content in pickled mustard tuber based on multiple
electrodes. Firstly, a hardware system consisting of ion selective electrodes, temperature sensor, reference electrode, signal
processing module, single-chip module etc. was designed and fabricated; secondly, the predication models for sodium and
chloride ions and data sampling and processing program software were established; finally, this system was used to measure
salt contents in three kinds of Fuling pickled mustard tuber, and the results were compared with those obtained with the
traditional testing method. The average error between the multiple electrode method and the traditional method was less than
5%, and their relative standard deviations were less than 2.0%. Additionally, there were no significant differences between
the two methods as verified by t-test. The time required for a single test was less than 20 seconds. Thus, the multiple
electrode method can be used as a quick way to determinate salt content in pickled mustard tuber.

Key words: salt content in pickled mustard tuber, multiple electrodes, ion selective electrode, rapid determination