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13
Carbonate
Testing
Procedure
1. Check the gas bag for leaks. To do this, collapse the bag and then con
-
nect the bag and stopcock to the hand pump, using a discarded Dräger
tube as the connection. Fully depress and release the hand pump. When
the bag is completely empty and free of leaks, the pump will remain de
-
pressed for several minutes. If a leak is detected, check the pump and all
connections. To check the pump alone, insert a sealed Dräger tube into
the pump opening and depress the bellows. It will remain depressed if the
pump does not leak.
2. With the bag now fully collapsed, close the stopcock and connect the rub
-
ber tubing from chamber 3 to the closed stopcock.
Sample Entry Point
Gas Bag (#151-06)
Stopcock (#151-07)
3. Using the table below, determine the sample volume and type of Dräger
tube required for your test.
Sulfide Range
(mg/L)
Sample Volume
(mL)
Dräger Tube
Identification
Tube Factor (Used
in Equation)
25 to 750
10.0
CO
2
100/a
2.5
50 to 1,500
5.0
CO
2
100/a
2.5
100 to 3,000
2.5
CO
2
100/a
2.5
250 to 7,500
10.0
CO
2
100/a
2.5
4. Fill the syringe with the measured amount of solid-free filtrate. Place a
rubber septum over the sample entry point above chamber 1. Force the
needle through the septum and inject the filtrate into chamber 1.
