Asimple alarm which can be adjusted to âsound off" when the recorder pen of a preparative gas chromatograph reaches a preset height above the base l...
the necessity of keeping one's eye and mind on the recorder during glpc purifica- tions. Such an alarm can be inexpensively constructed from a. battery powered ...
A Simple Versatile Collection Programmer for Preparative Gas Chromatography. Bruce H. Kennett,Commonwealth Scientific and Industrial Research ...
A Simple Versatile Collection Programmer for Preparative Gas Chromatography. Bruce H. Kennett,Commonwealth Scientific and Industrial Research ...
A Simple Electronic Alarm for Laboratory Application. Our students are ... It can he used as a burglar alarm system in alocker or drawer. It can even also take ...
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Students enjoy this exercise as it allows them to apply the skills learned in an electronics course to a chemistry laboratory.
A Simple Alarm to Aid in Preparative GLPC Fraction Collection
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A simple alarm which can be adjusted to "sound off" when the recorder pen of a preparative gas chromatograph reaches a preset height above the base line eliminates the necessity of keeping one's eye and mind on the recorder during glpc purifications. Such an alarm can be inexpensively constructed from a. battery powered bicycle horn. One switch wire from the horn is attached to the recorder pen carriage by means of a n alligator clip, with a portion of uninsulated wire exposed. The second lead from the horn is attached t o the recorder hodv a t a oosition such that an uninsulated portion of this lead will tonch the pen carriage iead when the pen is a t a predetermined level above the base line. Leads prepared as illustrated below are easy to adjust and attach to the recorder
