ELTRA CS-580A, Operating Manual

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Analysis
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The table below shows approximate sample weight and acid volume depending on
the expected TIC content in the sample.
TIC-content Sample weight Acid
>5 % 100 - 200 mg 2×2 ml
1-5 % 200 - 500 mg 3×2 ml
<1 % 1000 - 2000 mg 3×3 ml
Used Acids:
Acetic acid 25% concentration or Phosphoric acid 50% concentration.
NOTICE
Only the carbon of easily decomposable carbonates can be determined.
Carbonates which are difficult to decompose cannot be measured. For example,
elementary carbon (graphite, soot) and cyanides cannot be analyzed.
3.3 Applications
This chapter describes the operation modes for analysis of different sample
materials. For further materials contact the manufacturer.
NOTICE
The maximum weights of the samples should not be exceeded!
3.3.1 Coal
Temperature 1350°C
Weight:
300mg-500mg (Depending on the sensitivity of the IR cell and on the
C- and S-content of the sample.)
No accelerators are needed. Only in exceptional cases, when the sample contains
pyrites, the furnace temperature has to be set at 1500°C or approx. 300mg of iron
phosphate have to be spread on top of the sample.
3.3.2 Calcium Carbonate
NOTICE
Calcium carbonate can be used for calibration in the range of 12% C.
Temperature higher than 800 °C
Weight:
100mg-500mg (Depending on the sensitivity of the IR-cell.)
3.3.3 Graphite
NOTICE
Analysers with a range of 100% C can be calibrated with graphite.
Temperature higher than 1000 °C
Weight:
250mg
3.3.4 Limestone
NOTICE Calibrate analyser with calcium carbonate of 12% C.
Temperature 1250 °C or higher.
Weight
300mg
3.3.5 Oil, Asphalt and Rubber
Temperature 1450 °C
Weight
80mg-100mg (fuel oil and other thick oils)
Up to 50mg (thin oil analysis)
3.3.6 Wood
Temperature 1300 °C