littalnala
第31楼2013/03/24
GSB07-1183-2000 水质 铅(标样) 20ml玻璃安瓿 这种是吗?[/quote]对,这种就是[/quote]
请问具体怎么操作呢?能详解一下么,谢谢![/quote]将已经浓度稀释至你的曲线线性范围,当样品测定[/quote]
买回来的“已知浓度标样”也需要进行稀释后再当样品用的呀?那这样的话貌似也存在某些稀释误差吧?我还以为可以买到需要的相关浓度的标样呢,那样的话就可以直接当样品上机测试了[/quote]石墨炉测定PPB级别,这样的浓度不宜保存啊[/quote]
是吗?我用石墨炉测铅 主标液浓度是40ug/L,(仪器自动稀释4个点:8ug/L、16、24、32),并不是现用现配的[/quote]嗯,我也这样做过。主要没有权威的依据说明,一般也不会保留多久芙蓉[/quote]
那你的标液储备液浓度是怎么配的?一般用多久?按你说的,你的标液储备液每次应该配得不多吧?100ml?
依风1986
第39楼2013/03/24
2.5.3 Daily Performance Check
日常运作核查
The daily performance of the ICP machine shall be monitored by measuring the
intensity value of the control point standard solution and evaluating any trending per
the charting procedures stated below:
ICP日常操作应该被监控通过测量控制点标准溶液的发射强度值和评价下面提到的趋势
图程序:
2.5.3.1 The Intensity Trend Chart is obtained by plotting the intensity value against
the run number on a line graph. The intensity values shown below were
derived from 1.0 ppm standards in 5% nitric acid. Choose a concentration
value that is used in the calibration procedure (i.e. 1, 5 or 10 ppm) when
creating the Trend Chart. 20 different readings will be recorded and graphed
(see Figure 1).
强度趋势图通过绘制强度值与一根直线制对比得到。强度值显示是从1.0ppm的
5%硝酸的Mn标准溶液得出。当创建趋势图时选择一个浓度值用于校准程序(例
如:1,5或10ppm)。 记录20个读数并作图(见图1)。
1ppm pb ICP 強度趨勢控制圖列子
x is the intensity value of the control point standard solution (1ppm
standard solution of each element),
x是控制点标准溶液的强度值(1ppm的每个元素的标准溶液)。
xm is the mean intensity value of the control point standard solution which is
collected 20 times on different days.
Xm的是控制点标准溶液的平均强度值,是在不同的天收集到的20次数据。
SD is the standard deviation of 20 measurements.
SD是20次测量值的标准偏差。
UCL is upper control limit, UCL=xm + 3SD, LCL is lower control limit,
LCL=xm-3SD, UWL is upper warning limit, UWL=xm+2SD, LWL is lower warning limit,LWL= xm-2SD.
UCL是控制上线,UCL=xm + 3SD,LCL是控制下线,LCL=xm-3SD, UWL是警
戒上线, UWL=xm+2SD, LWL是警戒下线,LWL= xm-2SD。
2.5.3.2 Daily ICP intensity for each element should be tested and reported on the ICP
daily intensity chart. An example of the ICP intensity chart is attached in
Appendix 1. Intensity trend chart should be renewed every 6 months.
每个元素的ICP强度每天需要测试和记录在ICP日常强度图上。ICP强度图的一
个例子附于附件1。强度趋势图需要每6个月更新一次。• Prepare new control standard solution (1ppm standard solution of each
element)