唾液取样时什么叫做避免血液污染?在文献上看到一句话Blood contamination must be avoided when saliva is collected becausethis fact can lead to overestimation of chemicals if their concentra-tions are higher in blood than in saliva。避免血液污染要如何理解, 唾液 与血液存在物质交换不是很正常,基于此唾液中物质浓度与血液中物质浓度存在联系,可以用唾液替代血液进行某些物质测定,不是这样吗?查看更多7个回答 . 16人已关注