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CG-1818

GAS EVOLUTION MEASUREMENT APPARATUS

Apparatus provides a convenient and accurate method for the determination of the concentration or purity of active metals and metal hydrides. Metals and metal hydrides that can be analyzed in this manner include borane-methyl sulfide complexes, borane tetrahydrofuran, sodium and lithium as dispersions in mineral oil, lithium aluminum hydride. These active metals and metal hydrides react rapidly and quantiatively with suitable hydrolytic solvents to produce hydrogen gas. Available in three capacities: 50ml, 250ml and 1000ml. All complete units supplied with a buret, a CG-3502-04, -10 to 260º thermometer, a CG-1042-01 24/40 thermometer adapter and a leveling bulb with a 24/40 top outer and a lower detachable hose connection. The leveling bulb capacity varies with the capacity of the buret and has a hose connection of 8mm O.D. Flexible tubing is not supplied with the apparatus.

Item NumberItem DescriptionPQPriceQty AvailQuantity
CG-1818-01
50mL Gas Evolution Measurement Apparatus
EACH
Call for
Availability
CG-1818-02
250mL Gas Evolution Measurement Apparatus
EACH
Call for
Availability
CG-1818-03
1000mL Gas Evolution Measurement Apparatus
EACH
Call for
Availability
Item NumberItem DescriptionPQPriceQty AvailQuantity
CG-1818-20Buret Only, 50mL CapacityEACH
5
CG-1818-21Buret Only, 250mL CapacityEACH
3
CG-1818-23Buret Only, 1000mL CapacityEACH
4
CG-1818-30500mL Leveling BulbEACH
4
CG-1818-321000mL Leveling BulbEACH
1
CG-198-01Thread size: GL-14, Style: Bent, Hose OD (mm): 8.3, Hose ID (mm): 4, Length (mm): 40EACH✱
456
CG-198-02Thread size: GL-14, Style: Straight, Hose OD (mm): 8.7, Hose ID (mm): 5, Length (mm): 25EACH✱
258
CG-1046-01Adapter, Inlet, 24/40 Inner Joint, Hose ConnectionEACH
43
CG-3503-12Thermometer, Non-Mercury, Partial Immersion, -10°C to 260°C, 305mm OALEACH✱
28
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To operate:  Attach tubing from T-Bore stopcock to reaction. With both the T-Bore stopcock and upper valve open to the atmosphere, the leveling bulb is adjusted to give a zero reading for the level of distilled water in the gas buret. After the above process is complete, the T-Bore stopcock and the upper valve are turned so that the reaction and buret form a closed system. When the hydrolysis is complete, the water level in the capillary side tube will be at a level considerably below the water level in the buret. To obtain an accurate reading, the level in the buret must be equal to that in the capillary side tube. This is accomplished by rapidly lowering the leveling bulb to a point below the connection to the reaction and raising the bulb to its original position. This process is repeated until the level of water in the buret, leveling bulb and side tube are all equal. A final reading can now be taken from the calibrations on the buret.

Design Suggested By: Dr. Ron Najafi NovaCal Pharmaceuticals Emeryville, CA

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