Flow-injection-turbidimetry Determination of Potassium in Human Serum
WANG Zhao-xi (Department of Science Research, Wenzhou Normal College, Wenzhou, Zhejiang, 325035)
Based on its precipitation with sodium tetraphenyl-boron (TPB), a flow-injection-turbidimetry method for the quantitative determination of potassium in serum is related. The optimum conditions of the determination were studied. Calibration graphs of absorbance versus concentration are linear from 1.0×10-4 to 1.0× 10-3 mmolf44ml-1 with a correlation coefficient of 0.998. The average sampling rate is about 60 samples per hour. The relative standard deviation of this method was 2.63%. This method is both simplicity and rapidity.