CEM iPrep 12, Руководство пользователя, Страница: 14 / 30

10 Perform a Digestion
Perform a Digestion
Vessel Assembly
CAUTION
Never add sample or liquid to liner with sleeve in place. Use the vessel liner holder.
1. Place liners in vessel liner holder. All vessel components must be dry prior to use.
2. Add sample to the liner(s).
WARNING
Proper precautions must be taken to avoid contact with reagents or reagent vapors. Protective gear should
be worn as outlined in the user’s safety program for hazardous materials and the reagent manufacturer’s
safety data sheet. Refer to these guidelines for proper handling and disposal of the reagents.
2.1. Weigh and place the sample into the liner. The maximum sample weight varies per sample
type. See "Operating Parameters" for specific weights.
2.2. Add the acid (5 mL - 30 mL working volume). Use the acid to rinse the inside of the liner to
ensure that the sample is in the base of the liner.
If running more than one vessel, you must
run similar samples and the same acids and acid volume in each vessel. See "Sample Prepa-
ration Safeguards" for information regarding acid blanks along with additional safeguards.
2.3. Ensure that the acid covers the sample and the base of the liner (5 mL minimum).
CAUTION
Do not use water to dilute the acid(s) greater than 25% when running over 220 ºC or to add volume before
digestion. This can cause uneven heating of vessels.
Do NOT batch old liners with new liners unless new liners have been conditioned with at least 3 runs.
3. Wait 15 minutes to allow pre-digestion.
4. Install the plug into the liner. Slight resistance should be felt when placing the plug into the liner. If resistance
is not felt, try using another plug.