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Environmental

Chlorine Determination in Solid Waste

Sample Preparation
Samples may be analyzed as air dried
Crush and grind to make the sample size ≤0.5mm

Instrument
5E-CLT2310 Chlorine Analyzer

Instrument Settings
Oxygen : Flow 500ml/min;
Purity 99.5%
Vapour :2ml/min

Main Furnace Temperature:1100 ℃ Condensator temp. :20℃
Calibration Standard: GBT3558-2014
Nominal Sample Mass: 100 mg
Analysis Time: 45 minutes/per test

Special Modifications to Unit
None

Method Approval
GBT3558-2014, ISO11724, ASTM D6721

Procedure
1. Prepare instrument as outlined in the operator’s instruction manual (check the solutions ,pure water content and electrodes ,oxygen gas flow and etc.).
2. Do three blanks sample “Clt” titration (initialize the titration system)
3. Combustion pretreatment with two empty crucibles (this process only for first time of using of each day)
4. weigh a portion(0.1g) of solid waste sample in crucible, then cover the sample with a flat layer of silica sand;
5. Load two crucibles with sample as prepared in step4 , then” start”analysis.
6. 2 samples of calibration substance to check the calibration after 10 duplicate sample analysis;
7. Repetition of point 4 to point 6 until all samples are processed;

Note: Do Calibrating refer to operator’s instruction manual for details.

Typical Results
Code Name Mass(g) Clad% Range Average Clt ad%
1 Solid waste 0.1045 1.38 0.11 1.34 1.34
2 Solid waste 0.1037 1.39
3 Solid waste 0.1031 1.34
4 Solid waste 0.1090 1.27

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