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After measuring MASS WET and MASS DRY, the dry volume can be measured. (Be sure to let your samples cool in the desiccator before analyzing in the pycnometer or making the dry mass measurement.)


1.Double-click on the desired sample cell under Volume Dry. The prompt to verify sample ID and container number will appear; check to ensure they are correct.
2.Choose the pycnometer cell number to be used for the sample measurement (Figure 9). Place the sample in the selected pycnometer cell, and tighten the lid. Enter the number of measurement cycles (generally 3 measurements is acceptable). Once all parameters are set as desired and the sample has been entered into the chamber, click Measure.
3.The Volume Dry measurement interface will appear (Figure 10); to begin measurement click Start. This will initiate the pycnometer analysis; the process will automatically run through the total number of cycles selected in Step 2.

4.

Once the measurement is complete the Calculated Volume interface will appear. If this volume is acceptable click Accept; otherwise the sample can be reanalyzed by choosing Rerun (Figure 11).

5.

Note the Volume Dry field is now populated with the newly calculated volume.

6.

Under the Methods Completed column, double-click the cell for the particular sample run (Figure 12) to bring up a prompt for MAD Calc. Ensure that container number and sample ID are correct and click Run MAD Calc (Figure 13). This calculates the remaining data for the sample being measured (i.e., Mass Pore water, Mass Salt, Mass Solids, Volume Pore water, etc.).

7.

Expand list of parameters of choice in the result by clicking on one of the visible parameters (e.g., Mass Solids (g)), which opens a list with all the variables. These variables can be dragged per mouse click from the left to the right hand side.

8.

A standard should be run within each cycle measurement between cell 1-6. Please also remember to fill in the log sheet in Excel. The log sheet is very important for figuring out what went wrong.

9.

Data is automatically uploaded into LIMS once the MAD calc is complete (this includes any recalculation). Check the MAD LIMS report to verify.

 


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Figure 9. Choose Pycnometer Cell.

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