主题：【求助】Pb标准曲线

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

原文由 ldgfive(ldgfive) 发表:

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

你的标准曲线浓度太不了,吸光度值应该也是非常小的,过小的吸光度肯定会出现波动

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

原文由 chemistryren(chemistryren) 发表:

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

你是什么仪器啊??是用火焰测的吧??0.5PPM的吸光度有0.9之多??这么高的灵敏度精密度差也就不足为奇了.

原文由 xuemei86520(xuemei86520) 发表:

原文由 chemistryren(chemistryren) 发表:

原文由 xuemei86520(xuemei86520) 发表:
我做铅标准曲线时遇到一些问题，想请教一下高手，我配的铅标准溶液是0，0.1ug/ml,0.5ug/ml,1ug/ml,做出来的标准曲线的相关系数是0.9999，但用这条曲线，测上面的标准溶液差别很大，结果为下：
0.1ug/ml:0.0871,0.0822,0.0625,0.1117,0.0822
0.5ug/ml:0.4021,0.4759,0.4513,0.4267,0.4415
1ug/ml  :0.9484,0.9238,0.9385,0.9533,0.8007

你是什么仪器啊??是用火焰测的吧??0.5PPM的吸光度有0.9之多??这么高的灵敏度精密度差也就不足为奇了.

是的，我用的是岛津6300c火焰原子吸收，那样怎样提高提高精密度，用这样的曲线测得的样品结果准确吗？