There’re many disadvantages of traditional manual testing the concentration of molybdenum ion in sodium tungstate solution. For example, it has poor reproducibility and it’s easy to produce precipitation. The operation is tedious and cost is high. This paper introduces using flow injection technology to combine with spectrophotometric method. Setting up an online inspection system of molybdenum ion and a series of optimization to the experimental conditions and experiment method greatly improves the stability and sensitivity. The continuous on-line analysis is realized. It can be applied in the online testing of molybdenum ion in sodium tungstate.

 

Experiment principle: when the sample and reagent produce chromogenic reaction, non-ferrous material is generated. Nonferrous material is current-carrying pushed through flow pool. Non-ferrous material absorbs the photons. Through the photoelectric cell, make the photon energy to convert into electrical signals. Load into the computer, according to the size of absorbance, concentration is detected. In the detection of molybdenum ion process, the influence of tungsten ion in sodium tungstate on testing molybdenum ion must be considered.

Through the experiment we can draw the following conclusions:

To sum up, using the chromogenic reagents of experimental configuration and combining flow injection technique with spectrophotometric method can online test molybdenum ion concentration well. Configuring different reagents on this method can test different ion concentration conveniently and fast.