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CKIC / Changsha Kaiyuan Instruments Co., Ltd
Mercury Determination for Biomass

Mercury Determination for Biomass

Product catalog summary

Sample Preparation
Boats should be pre-baked at 550°C for an hour or analyzed without a sample before loading. Samples can be analyzed as air-dried and should be crushed and ground to a size of ≤0.2mm.

Instrument
The analysis is conducted using the 5E-HGT2320 Automatic Mercury Analyzer.

Instrument Settings

Oxygen Flow: 300ml/min; purity ≥99.9%
Pressure: 0.1 Mpa
Main Furnace: Drying Temp. 300℃ for 90s; Combustion Temp. 800℃ for 180s
Catalyst Furnace Temp.: 600℃
Purge Time: 60s
Nominal Sample Mass: 50mg~70mg
Analysis Time: 6 minutes per test

Calibration Standard
Use Standard Mercury Solution or equivalent Certified Reference Materials.

Method Approval
Approved methods include GB 16659-2008 and ASTM D6722-11.

Procedure

Prepare the instrument as per the operator’s manual, checking pressures, temperatures, and voltage.
Keep the instrument in “prepare” state for at least 30 minutes.
Conduct three blank sample tests to reduce the blank level. If the blank LC_peak is higher than 0.001, more blank samples are suggested.
Weigh a standard sample (60mg) in a nickel boat, input the weight in the software, and start the test. Ensure the sample position corresponds to the crucible number in the software.
If the standard sample is within the tolerated content range, proceed. Otherwise, conduct two more standard sample tests. If still out of range, build a new calibration curve.
Weigh two biomass samples (60mg) in nickel boats, input the weight in the software, and start the test.
Check calibration with one standard sample after every 10 duplicate sample analyses.
Repeat steps 6 to 8 until all samples are processed. Refer to the operator’s manual for calibration details.

Typical Results
Results for wood samples show varying mercury content, with average values provided for each sample.

Catalog excerpts

Mercury Determination for Biomass Sample Preparation Boats should be pre-baked at 550°C for an hour or analyzed (without a sample) before loading a sample Samples may be analyzed as air dried Crush and grind to make the sample size <0.2mm Instrument 5E-HGT2320 Automatic Mercury Analyzer Instrument Settings Oxygen : Flow 300ml/min; purity >99.9% Pressure :0.1 Mpa Main Furnace Drying Temp.: 300°C Time: 90s Combustion Temp.: 800C Time: 180s Catalyst Furnace Temp.: 600C Purge Time: 60s Nominal Sample Mass: 50mg~70mg Analysis Time: 6 minutes/per test

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Calibration Standard Standard Mercury Solution or equivalent Certified Reference Materials. Method Approval GB 16659-2008 / ASTM D6722-11 Procedure 1. Prepare instrument as outlined in the operator’s instruction manual, (check the Inlet pressure, Outlet2 pressure, Furnace temperature, Catalytic tube temperature and Voltage.) 2. Keep the instrument in “prepare” state for at least half an hour 3. Do three blank samples test to reduce the blank level; (if the blank LC_peak is higher than 0.001, more blank sample is suggested) 4. Weigh one standard sample (60mg) in nickel boat, input the sample weight...

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8. Repetition of point 6 to point 8 until all samples are processed Note: Do Calibrating refer to operator' s instruction manual for details. Typical Results

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