multi EA 5100
Sulfur analysis with the S module 5100 coulometric
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As soon as the cell potential goes outside of the operating range, the software will auto-
matically start an end point routine.
Cell potential is lower than the operating range:
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Automatic generation start (iodine generation)
Cell potential is higher than the operating range:
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Add sodium sulfite solution when the software instructs.
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Titration runs automatically until the cell potential sinks to 120 mV.
An end point routine is also automatically started when electrolyte is replaced.
When working with a MMS, the addition of chloride ions to the measuring cells can be
performed automatically if the indicator value exceeds the operating range while an
analysis sequence is in progress. For this, the user must have prepared a suitable organic
sulfur solution and placed it in the intended position (110) on the sample rack.
Checking the measuring cell
Only check the measuring cell if a defect of the detection module is suspected.
A sodium sulfate solution (1000 mg/l) is required for the check of the measuring cell.
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Reagents required: 1.5482 mg sodium thiosulfate pentahydrate
}
Weigh the indicated quantity of sodium thiosulfate into a 100 ml volumetric flask.
}
Fill the volumetric flask with ultrapure water up to the calibration mark. Shake the
solution until the salt has dissolved completed.
The solution can be kept for approx. 1 month in a tightly-sealed container.
Standard solutions can be prepared by diluting the solution.
100 μl of the diluted solutions contain the following TS amounts:
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10 mg/l standard: 1 μg S absolute
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100 mg/l standard: 10 μg S absolute
After the function test of the measuring cell with the sodium thiosulfate solution, the
electrolyte must be replaced.
10.3.2 Operating the analysis system
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Place the measuring cell with electrodes and electrolyte solution in the detection
module and connect it to electricity.
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Switch on the basic module and the detection module.
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The devices boot up. The status LED on the front of the basic module light up in
green after approx. 30 s.
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The LED on the front of the detection module flashes during the run-in period.
Depending on the detector, the run-in period can take up to 30 min. After this,
the LED will light up continuously. Starting a measurement is only then possible.
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Open the gas supply and set the required gas pressure.
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Switch on the PC.
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Start the control and analysis software and login with your username and password.
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Initialize the analysis system by clicking on [Initialize analyzer].
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The initialization and automatic detection of all connected components will be
carried out.
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Ready the samples.
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Activate a pre-existing method via the Method |Method - activate menu item.
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Alternatively: Create a new method in the Method |Method - new menu. Select the
measurement parameter in the method. Release and activate the method.
