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UH5300 spectrophotometer was developed pursuing a new operability which has never existed in the past and the instrument can be controlled by iPad or Windows PC. When analyzing many samples or a change over a long period of time, the real-time confirmation of the data from a remote area is possible. The next sample can be prepared based on the analysis result or the status of the analysis can be confirmed at any time and therefore, the increased work efficiency can be expected. This time, phosphate ion in drainage water, that is to be controlled through the analysis of many samples, was analyzed. When the calibration curve was prepared for a range of 0.01 –2.0 mg/L, a good calibration relationship with the correlation coefficient (R2): 0.9997 was obtained.