Metrohm 746 VA Trace Analyzer - Manual (Page 94)

4.2 Lead determination with standard addition
746 VA Trace Analyzer / 747 VA Stand
4-9
4.2 Lead determination with standard addition
With the aid of this illustrative method for the determination of lead in
the ion standard solution supplied, you can easily check whether the
746 VA Trace Analyzer and the 747 VA Stand are functioning properly.
At the same time, you will learn how to set up a method with standard
addition and will be introduced to the basic operation of the 746 VA
Trace Analyzer.
Before you can perform this illustrative method, you must first prepare
the instruments as described in section 4.1.
4.2.1 Reagents
The following solutions are needed to perform the method TESTPb.mth :
− Potassium chloride solution, c(KCl) = 3 mol/L (Metrohm No.
6.2308.020)
− Lead ion standard solution, ρρ(Pb 2+ ) = 1 g/L (Metrohm No. 6.2301.100)
− Dist. or deion. water
4.2.2 Loading the method TESTPb.mth
To load the method TESTPb.mth from the method memory into the working stor-
age, the following steps are necessary:
1 Switch on instrument
• Switch on the 746 VA Trace Analyzer with mains switch 11 11 at the rear of
the instrument. The instrument is initialized. If all is in order and the 747
VA Stand is attached properly, the dialog page "MONITORING" appears
after a few seconds.
2 Switch to dialog page "METHODS"
• Press the yellow key. The "METHODS" dialog page ap-
pears showing the methods stored in the instrument:
Files : 39 of 256 METHODS
Available: 1353520 Bytes
File
ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД ДДДДДДДДДДДД
*#NEW.mth *AB110.mth *AB116_1.mth *AB116_2.mth
*AB116_3.mth *AB117.mth *AB123_1.mth *AB123_2.mth
*AB131.mth *AB146.mth *AB176_2.mth *AB186.mth
*AB196_1.mth *AB196_2.mth *AB199_1.mth *AB199_2.mth
*AB220.mth *AB226.mth *AB226_2.mth *AB231_1.mth
*AB231_2.mth *AB241.mth *AB243.mth *AB254.mth
*AB74_1.mth *AB74_2A.mth *AB74_2B.mth *AB74_3.mth
*AB76.mth *AB96.mth *AB96_2.mth *AB97.mth
*AB98.mth *ASV.mth *CALCRV.mth *INTSTD.mth
*POL.mth *TEST747.mth *TESTPb.mth
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