multi EA 4000
Operation
91
CAUTION
When feeding the furnace whilst simultaneously monitoring combustion protective
goggles must be used.
Start the measurement. Then move the boat into the furnace.
Move the boat into the combustion tube up to just behind the gas sluice so that the
center of the boat is at the height of the front plate. Allow the boat to briefly heat
through.
Then carefully move the boat into the hot zone of the combustion furnace. Con-
stantly monitor the end of the oxygen supply tube whilst doing so. As soon as it
lights up due to the combustion of the pyrolysis gases, hold the boat in the current
position. Once the radiance has reduced, slowly move the boat on. When the boat
lights up again, stop it again etc. until the boat is completely within the furnace
(the position is marked by the stop of the sample feed). In this position, the volatile
pyrolysis products are incinerated at 1000-1100 °C.
After moving the boat into the hot zone confirm the on-screen prompt with [OK].
NOTICE
The boat must be moved extremely slowly to allow the pyrolysis gases to develop
slowly and incinerate completely. If the sample is fed too quickly, this might lead to in-
complete combustion and soot build-up in the analysis system, leading to incorrect
measuring results.
The analyzer starts processing the analysis sequence. The M
EASUREMENT
–
A
NALYSIS
window opens. The measuring routine starts with titration delay.
6.4.6
Checking the split ratio
The split ratio set must be checked before a measurement series with a standard and
any deviation corrected.
The following standard concentrations are recommended:
Measuring cell
standard concentration
"high concentration"
1 molar HCl
"sensitive"
0.1 molar HCl
1.
Transfer 50 µl of the standard on a ceramic mat in a boat into the hot furnace.
2.
Perform the determination with the method:
Repeat the measurement of the standard three times and determine the aver-
age value.
Calculate the split factor F:
𝐹𝐹
=
𝑎𝑎
𝑠𝑠𝑁𝑁𝑠𝑠𝑠𝑠
/
𝑎𝑎
𝑖𝑖𝑠𝑠𝑁𝑁
𝑎𝑎
𝑠𝑠𝑁𝑁𝑠𝑠𝑠𝑠
expected absolute Cl content in µg
𝑎𝑎
𝑖𝑖𝑠𝑠𝑁𝑁
average absolute Cl content from the 3 standard measurements
Use manual sample feed
Summary of Contents for Analytik Jena multi EA 4000
Page 1: ...Operating Manual multi EA 4000 Elementary analyzer C S and Cl solids analysis...
Page 50: ...Commissioning multi EA 4000 50 Figure 32 multi EA 4000 C S Hose diagram...
Page 52: ...Commissioning multi EA 4000 52 Figure 33 multi EA 4000 Cl Hose diagram...
Page 54: ...Commissioning multi EA 4000 54 Figure 34 multi EA C S Cl for C S measurements Hose diagrams...
Page 55: ...multi EA 4000 Commissioning 55 Figure 35 multi EA 4000 C S Cl for Cl measurements...
Page 57: ...multi EA 4000 Commissioning 57 Figure 36 Automatic TIC solids module Hose diagrams...
Page 58: ...Commissioning multi EA 4000 58 Figure 37 multi EA 4000 C S with automatic TIC solids module...
Page 61: ...multi EA 4000 Commissioning 61 Figure 39 multi EA 4000 C S Cl with man TIC solids module...