作者：
谢宇;李慧怡;周悦;叶蓉姿;谢嘉颖;谭建华;
中文关键词：
牙膏;;预防;;外源性色素;;紫外吸收光谱法;;色差法;;组内相关系数
中文摘要：
分别采用紫外吸收光谱法和色差法评价了5款市售牙膏预防外源性色素沉积功效,并结合牙膏中植酸钠、三聚磷酸钠、焦磷酸钠3种功效成分的总含量对比分析了两种功效评价方法的差异。结果显示,紫外吸收光谱法与色差法所得5款牙膏预防外源性色素沉积功效高低结论相近,且与牙膏中植酸钠、三聚磷酸钠、焦磷酸钠的总含量高低呈正相关。同时,该研究尝试采用相关性分析和组内相关系数检验对两种评价方法的结果间等价性进行了初步分析。结果显示,两种评价方法的结果间存在中度正相关关系,R~2=0.725;组内相关系数ICC值为0.852 (P<0.05),提示两种方法测量结果从统计学角度可认为有等价性。
英文篇名：
Comparison of two methods for evaluating the toothpastes on the efficacy of prevention of extrinsic staining
英文作者：
XIE Yu;LI Hui-yi;ZHOU Yue;YE Rong-zi;XIE Jia-ying;TAN Jian-hua;Guangzhou Quality Supervision and Testing Institute;
英文摘要：
The efficacy of prevention of extrinsic staining were evaluated for 5 commercial toothpastes by two methods, i.e., UV-Vis absorption spectrometry and colorimetric method. Combined with the quantities of sodium phytate, sodium tripolyphosphate and sodium pyrophosphate in each toothpaste, the differences between the results of the two methods were compared. The results showed that, similar rankings among the 5 toothpastes are obtained for the two methods in evaluating the efficacy of prevention of extrinsic staining; in addition, the total quantity of the three active ingredients(i.e., sodium phytate, sodium tripolyphosphate and sodium pyrophosphate) is positively correlated with the efficacy of prevention of extrinsic staining. Furthermore, pearson correlation coefficient and intra-class correlation coefficients(ICC) were used to analyze the preliminary results obtained from the two methods. In conclusion, moderate positive correlation was found between the two results, i.e., R2=0.725; moreover, ICC=0.852(P<0.05), indicating that the results of UV-Vis absorption spectrometry and colorimetric method were statistically consistent.
英文关键词：
toothpaste;;prevention;;extrinsic stain;;UV-Vis absorption spectrometry;;colorimetric method;;ICC
