Reagents
Absorbing reagents for the VSC-33 are not shipped with the glassware assemblies. These
chemicals are either shipped directly from the vendor, or reagents may be mixed according to the recipes
presented below. It is recommended persons preparing the reagents possess basic laboratory skills.
1. Confining Solution, (for use in burette). Add 100 g of sodium sulfate (NaSO
4
) to 500 ml distilled
water. To this solution, add 20 ml concentrated sulfuric acid, (H
2
SO
4
), and a few drops of methyl
orange indicator.
2. Potassium hydroxide solution, 45%, (for CO
2
absorption). This solution can be purchased from
chemical suppliers in 500 ml containers. Alternatively, the solution can be made by adding 440 g
potassium hydroxide crystals to 1 liter distilled water.
3. Potassium pyrogallate solution, (for O
2
absorption). Add 22 g of pyrogallol (pyrogallic acid; 1,2,3-
trihydroxybenzene) to 500 ml of 45% (w/w) KOH solution prepared in Step 2.
4. Cuprous chloride solution, acidic, (for CO absorption). Carefully add 650 ml of concentrated
hydrochloric acid (HCl) to 325 ml distilled water. Slowly, and with frequent mixing, add a mixture
of 86 g copper (II) oxide (CuO) and 17 g of metallic copper to the HCl solution. After addition of
the CuO/Cu mixture, suspend a spiral copper wire to the bottom of the container. Shake
occasionally. When the solution becomes colorless, it is ready for use.
VSC-33
APEX INSTRUMENTS, INC.
7
Solution for determining Carbon Monoxide in gas analysis, 8 oz bottles.
Cases Only. 12 per Case.
Replacement Fluids
Burrell Oxsorbent
For Domestic Delivery Only
Cases Only. 12 per Case.
to Hazardous Classification
Drop Ship Direct Only due
Solution for determining oxygen in gas analysis, 8 oz bottles.
Burrell Cosorbent
B39-710
B39-720
Burrell Disorbent
Cases Only. 12 per Case.
Solution for determining Carbon Dioxide in gas analysis,16 oz, bottles.
B39-730
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