Analytik Jena multi EA 4000 User Manual

Operation
multi EA 4000 Version 01.16 69
11. Click on the button [START MEASUREMENT].
The sample is pyrolized at temperatures between 300 and 600 °C (front furnace zone).
The resulting pyrolysis products are completely oxidized in the oxygen flow at 1000 °C.
Using the autosampler FPG 48
− Select a suitable program for the feed with the autosampler that includes an ex-
tended dwell time in the heating area near the furnace inlet
− With very reactive samples use the optionally available flame sensor.
Using manual sample feed
CAUTION
When loading the furnace whilst at the same time monitoring the combustion, protective
goggles must be worn.
− Start the measurement before the boat is moved into the furnace.
− Push the boat up to just behind the gas airlock into the combustion tube so that
the center of the boat is at the level of the front panel, and allow it to heat up
briefly.
− Then push the boat carefully into the hot zone of the combustion tube. Monitor
the end of the oxygen supply tube constantly. As soon as there are luminous ef-
fects from the combustion of the pyrolysis gases, hold the boat in its current posi-
tion. Once the luminescence dies down, slowly move the boat on. Stop again
when there is luminescence, until the boat is fully in the furnace (the position is
predefined by the stop of the feeding tool). In this position the volatile pyrolysis
products are incinerated at 1000 – 1100 °C.
− After transferring the boat into the hot zone confirm the on-screen message with
[OK].
IMPORTANT
The advance of the boat must be very slow to allow the pyrolysis gases to develop slowly
and be incinerated completely. Feeding the sample too fast can result in incomplete combus-
tion and sooting
up of the analysis system with incorrect measuring results as a conse-
quence.

The analyzer starts processing the analysis sequence. The MEASUREMENT -
ANALYSIS
window opens. The measuring routine with titration delay starts.
7.4.6 Checking the splitting ratio
The splitting ratio set must be checked before a measuring series with a standard and any
deviations must be corrected.
The following standard concentrations are recommended:
Measuring cell
Standard concentration
"high concentration" 1 N HCl
"sensitive" 0.1 N HCl
1. Move 50 µl of the standard on ceramic mats in a boat into the hot furnace.
2. Using the method perform a detection:

Analytik Jena multi EA 4000 Specifications

General

Brand	Analytik Jena
Model	multi EA 4000
Category	Measuring Instruments
Language	English