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(一)前言为了提高离子选择电极在标准添加法中测定的准确度及灵敏度,松下宽(日)等人提出了离子选择电极改进标准添加法,对所提出的数学模型用作图的方法进行结果处理。为了克服作图法费时且误差较大的缺点,本文采用自制高氯酸根涂丝电极,并用PC-1500计算机进行结果处理,求测了在氯酸根存在下的高氯酸根浓度,在CclO_4~-=1.00×10~(-4)M,CclO_3~-=1.00×10~(-2)M,0.1M NaCl体系中,测得Cclo_4~-=1.08×10~(-4)M(六次) 。 (二)改进标准添加法定量原理及计算机算法定量原理改进标准添加法为在体积为V的样品液中,滴入含有待测离子的标准溶液C_s,然后在恒离子强度下稀释,并测定滴入及稀释过程中的电位值,读取滴入及稀释体积——电位曲线上
(A) Introduction In order to improve the accuracy and sensitivity of the ion-selective electrode in the standard addition method, Matsushita Kwan et al. Proposed an improved standard addition method for the ion-selective electrode and performed the method of using the proposed mathematical model as a graph Results processing. In order to overcome the shortcomings of time-consuming and error-prone plotting method, we use self-made perchlorate coated wire electrode and PC-1500 computer to process the results. The concentration of perchlorate in the presence of chlorate was determined. Clo_4 ~ - = 1.08 × 10 ~ (-4) M (six times) in the system of 0.1 M NaCl = 1.00 × 10 -4 M, CclO 3 ~ - = 1.00 × 10 -2 M, . (B) to improve the standard method of adding quantitative principles and computer algorithms Quantitative principles to improve the standard Add method for the volume of V in the sample solution, dropping a standard solution containing ions to be measured C_s, and then dilute the constant ionic strength and determine the drop Enter and dilute the potential value, read the drop and volume-potential curve