Preparation of Middle Distillate SRM Blends

The video tutorial explains the process of preparing a sulfur concentration standard using a log-log chart. It details the preparation of a standard near the EPA regulatory limit using SRM 2770 and RM-8771. The tutorial covers weighing and mixing components, handling SRM 2770 and RM-8771, and calculating the final sulfur concentration. The goal is to achieve a concentration close to 14 PPM with an uncertainty of 0.13 PPM.

What does the log-log chart in the video represent?

• Uncertainty versus sulfur concentration

• Sulfur concentration versus time

• Uncertainty versus time

• Sulfur concentration versus temperature

What is the target concentration for the standard prepared near the EPA regulatory limit?

• 12 PPM

• 13 PPM

• 14 PPM

• 15 PPM

What balance type was used in the experiment to weigh the components?

• Fireplace balance

• Four-place balance

• Three-place balance

• Two-place balance

How much of the high member SRM 2770 is initially withdrawn into the syringe?

• 3 grams

• 5 grams

• 2 grams

• 4 grams

What is the final weight of the low end member RM-8771 delivered into the bottle?

• 4.54752 grams

• 4.6 grams

• 4.7 grams

• 4.5 grams

What is the calculated sulfur concentration of the prepared sample?

• 14.00 PPM

• 13.66 PPM

• 14.50 PPM

• 13.50 PPM

What is the uncertainty associated with the calculated sulfur concentration?

• 0.13 PPM

• 0.15 PPM

• 0.20 PPM

• 0.10 PPM