Hanna Instruments HI 83214 - Manual (Page 63)

63
Blank Sample
Blank Sample
Blank
D.I. Water
Sample
Sample
Phosphorus, Total HR
Reagent Blank Correction: This method requires a reagent blank correction. A single blank vial may be used
more than once; the blank vial is stable up to one day (room temperature). For most accurate measurement, run
a blank for each set of measurements and always use the same lot of reagents for blank and samples.
• Preheat the Hanna Reactor HI 839800 to 150 °C (302 °F). For correct use of the reactor follow Reactor
Instruction Manual.
The optional HI 740217 safety shield is strongly recommended.
DO NOT USE AN OVEN OR MICROWAVE samples may leak and generate a corrosive and possibly explosive
atmosphere.
• Remove the caps from two Reagent Vials.
• Add exactly 5.0 mL of sample to one vial (sample vial), and 5.0 mL of deionized water to the other
vial (blank vial), while keeping the vials at a 45-degree angle.
• Add the content of one packet of Potassium Persulfate for Phosphorus analysis to each vial. Replace the
cap tightly and shake gently the vials until all the powder is completely dissolved.
• Insert the vials into the reactor and heat them for 30 minutes at 150 °C.
• At the end of the digestion place the vials carefully in the test tube rack and
allow to cool to room temperature.
Warning: The vials are still hot, be careful when handling them.
←
green label
→