Metrohm 797 VA Computrace User Manual

Page 236

8 How to ...?

797 VA Computrace – Software

224

The “Addition mixing time” can be defined on the

Deter-

mination

tab of the

EDIT WORKING METHOD PARAME-

TERS

window.

6. Second Measurement:

Conditioning cycles

(Number of “conditioning cycles” de-

fined in

No. of cycles

on the

Voltammetric

tab of the

EDIT

WORKING METHOD PARAMETERS

window)

Pretreatment

Sweep

(Number of sweeps is defined in

No. of sweeps

number of saved sweeps in

Save last .. sweeps

on the

Volt-

ammetric

tab of the

EDIT WORKING METHOD PARAME-

TERS

window)

Note: Instead of repeating sweeps, you can also repeat
the whole Measurement cycle. Define the number of repli-
cations in

No. of replications

on the

Determination

tab of

the

EDIT WORKING METHOD PARAMETERS

window. Met-

rohm recommends to set the

No. of replications

on 1, the

No. of sweeps

on 4 and

Save last .. sweeps

on 2.

7. Second Addition
8.

Addition mixing time

Continue with measurement, addition, mixing as long as necessary.

Brightener Analysis with 838 Advanced Sample Processor and "MLAT"

Following installations and settings are recommended for the au-
tomated Brightener determination with the 838 Advanced Sample
Processor and

Calibration

technique "MLAT":

Instruments

Install the

838 Advanced Sample Processor

, three

800 Dosi-

nos

and a

732 Relay Box

with two

823 Membrane Pump

Units

(see Hardware Manual 797 and Instructions for Use 838).

Dosinos:

Dosino 1:

50 mL Exchange Unit

VMS solution

Dosino 2:

2 mL Exchange Unit

Brightener standard so-
lution

Dosino 3:

2 mL Exchange Unit

Suppressor concentrate

Method at 838

Before each start, define the position of the first sample vessel for
the 838 parameter "

SAMPLE

" with the 838 keypad.

Set method

LAT

at the 838 Advanced Sample Processor.