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Figure 41. Calculating the packing density.

8. Calculate the packing density using the sample weight recorded in the previous steps.

Reflectance Measurements Using the Powder Cell Holder

To perform reflectance measurements using the Powder cell holder, proceed as follows.

1. Load the powder cell containing the Spectralon insert against the reflectance sample

port of the sphere. There should be a Spectralon reflectance standard mounted at the

reference port.

2. Record one of the baseline scans as directed previously. DRA configuration during the

baseline scan should conform exactly to the configuration anticipated during the sample

scan.

3. Replace the powder cell sample holder at the sample reflectance port with the powder

cell containing the sample. Do not change the configuration of the integrating sphere in

any other way.

4. Open the Setup Dialog and check the instrument parameter Setup. Normally, the Setup

parameters for the application should match those used for the baseline scan. If using a

previously defined baseline correction, retrieve the correct baseline.

5. Record the sample scan by selecting the Start button in Cary WinUV software.

6. If the standard reference option was used for the baseline scan, the reflectance spectra

is generated automatically. If the simple or zero baseline correction was selected without

the standard option, multiply the sample scan data by the spectral reflectance factors for

the calibrated reflectance standard.

To obtain the best results follow these guidelines when using the Powder cell holder.

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Mantis 5000 Especificaciones Pagina 47