TriStar II 3020 Preparing for Analysis
302-42828-01 - Dec 2012 3-19
9. Remove the sample tubes and filler rods from the oven and allow to cool.
10. Wipe a rubber stopper with a lint-free cloth.
11. Label the sample tube and stopper for identification.
Determining the Sample Mass
Analysis results are expressed in units of surface area per gram of sample; therefore, it is important the
true sample mass be known. The true mass is best calculated as:
• weigh the empty Sample Tube Set (sample tube and stopper or seal frit) before degas
• weigh the Sample Tube Set with sample before degas and subtract the weight of the empty Sample
Tube Set
• weigh the Sample Tube Set with sample after degas and subtract the weight of the empty Sample
Tube Set
• weigh the Sample Tube Set with sample after analysis and subtract the weight of the empty Sample
Tube Set
A Sample Data Worksheet for recording the weights and calculating the mass is included in Appen-
dix A. Make copies as needed.
Use a copy of the Sample Data Worksheet to record the following:
1. Record the Sample Tube Identification.
2. Place the sample weighing support on the balance. Tare the balance and allow it to stabilize at
zero (0).
Do not insert the filler rods at this time. Filler rods are inserted just before the sample
tube is installed on the analysis port.
To Next Page
Loading...
