Metrohm 746 VA Trace Analyzer - Manual (Page 142)

4.5 Basic method for DP polarography
746 VA Trace Analyzer / 747 VA Stand
4-57
4.5.3 Method specifications of the method POL.mth
In this section the 5 dialog pages of the group "Method Specifications" associated
with the loaded method POL.mth will be explained in detail. If you are interested
only in a rapid lead measurement, you can proceed directly to section 4.5.4.
1 Switch to dialog page "OPERATION SEQUENCE"
• Press the yellow key. The dialog page "OPERATION
SEQUENCE" appears with the main program:
Method: POL .mth OPERATION SEQUENCE
Title : Polarographic method / DP / 150 mV -> -1150 mV
Instructions t/s Main parameters Auxiliary parameters
ДДДДДДДДДДДДД ДДДДДДДДДДДДД ДДДДД ДДДДД ДДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДДД
ДДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДДД
1 SMPL>M V.fraction mL V.total L
2 DOS>M Soln.name Acetate V.add 1.000 mL
3 PURGE
4 STIR 300.0 Rot.speed 2000 /min
5 ! (ADD
6 PURGE
7 TSTIR 30.0 Rot.speed 2000 /min
8 ØPURGE 5.0
9 (REP
10 SEGMENT Segm.name polaro
11 REP)0
12 ! ADD>M Soln.name V.add 0.100 mL
13 ! ADD)0
14 END
Modify
column
Modify
line
Delete
instr.
Insert
instr.
Method
labels
• The following is a brief explanation of the main program sequence:
Line 1 Addition of 10 mL sample
Line 2 Addition of 1 mL acetate buffer 1mol/L pH 4.6
Line 3....4 Purging and stirring of the analysis solution for 5 min
Line 5...13 Prepared loop for standard addition (inactive)
Line 6....7 Purging and stirring of the analysis solution for 30 s
Line 8 Switching off the purging. Stabilization time 5 s
Line 9...11 Prepared loop for replication of the segment
Line 10 Call-up of the segment polaro
Line 12 Prepared instruction for addition of the standard
addition solution (inactive)
Line 14 End of main program
2 Switch to dialog page "SEGMENT"
• Press the yellow key. The dialog page "SEGMENT"
appears with the program for measured value acquisition: