Abstract: Based on the flow injection analysis technology and molybdenum blue reaction principle, the successful development of a rapid and accurate determination of the plant boiler water to the water and trace silicon automatic analysis methods. Experiments on the impact sensitivity various factors such as wavelength, temperature, the pump speed, reaction tube length, acidity, size of the quality of sample volume, reductant and the types of design. The method has good repeatability, speed of analysis for 50 ~ 70 samples / h, measured in the range of 0.5-2.0 mg / L and 5 ~ 100 µg / L two quality volume within The results were very good, and the plant can meet the day-to-day analysis of trace silicon needs. (Google translation)