耶拿石墨炉Z650P，做Pb，第9位样品的吸光度＜第10位，但是浓度值相反，请问是什么原因？谢谢！（其中第7位不是试剂空白，填错了，实际是Pb60ug/L。）[img=,690,517]https://ng1.17img.cn/bbsfiles/images/2019/08/201908291736444348_2314_2901255_3.png[/img][img=,690,517]https://ng1.17img.cn/bbsfiles/images/2019/08/201908291736448968_8363_2901255_3.png[/img][img=,690,920]https://ng1.17img.cn/bbsfiles/images/2019/08/201908291736513772_3144_2901255_3.png[/img][img=,690,920]https://ng1.17img.cn/bbsfiles/images/2019/08/201908291736598750_9476_2901255_3.png[/img][img=,690,920]https://ng1.17img.cn/bbsfiles/images/2019/08/201908291737003781_163_2901255_3.png[/img]