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本文利用pH滴定－主成分回归法同时测定了苯酚、邻苯二酚、邻苯三酚的混合物，结果良好。通过交差验证法，本文还对采样区间和采样间隔作了详细讨论。
In this paper, the pH titration - principal component regression method for simultaneous determination of phenol, catechol, pyrogallol mixture, the results are good. By cross validation method, this article also discussed the sampling interval and sampling interval in detail.