LABPOR
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Filter Funnels
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Extraction • Thimbles Filter Crucible • Filter Candles • Gas Dispersion • Tubes
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REPORT
POROUS PLASTIC LABORATORY WARE
Immersion Filters Membrane Support Tubes
MATERIALS
Porous Tubes Coarse Porous Back-Up Sheets
Proposed Analytical Programs in Space
POREX
CORP.
Porous Sheets
348 Bay S t r e e t · Fairburn, Ga.
Circh No. 124 on Readers' Service Card
New design improves performance, reduces price
12
Λ I z , $70 . . . 12" χ 24", $105
(115 or 230 v)
THERMOLYNE
TYPE 2 2 0 0 HOT PLATES offer precision thermostatic a n d fast heat-υρ
control
over t h e
entire stepless r a n g e to 7 0 0 ° F Write for literature and name of nearest dealer. T H E R M O L Y N E C O R P O R A T I O N , Dept. 478, 2555 Kerper Blvd., Dubuque, Iowa
Circle No. 5 on Readers' Service Card 28 A
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ANALYTICAL CHEMISTRY
for 2 hours. The subassembly must function after each test. Explosive atmosphere tests, using hydrogen and oxygen mixtures, are conducted to demonstrate t h a t t h e operating sub-assembly will not cause ignition of Centaur fuel boil off gases. I t also must n o t ignite ethylene oxide used in sterilization. Other tests such as electromagnetic interfer ence tests are used to verify t h a t there will be no interference with, or susceptability to, other assem blies on t h e spacecraft or a n y por tion of the launch vehicle. After each sub-assembly has been checked, the entire spacecraft is assembled and p u t through a test procedure.
The major analytical chemistry efforts in space are mainly con nected with lunar and planetary programs. Since the moon is the first space island to which a manned spacecraft can venture, it h a s be come the focal point of much of the scientific endeavor. Early, u n manned flights, will provide a de tailed survey of t h e lunar surface. The determination of its chemical and mineralogical composition, and its physical properties by re mote analytical techniques will re quire t h e combined knowledge of the analytical community. At t h e present time, these un manned flights are grouped in three main programs. I n 1963-64 the Ranger program will attempt to m a k e a rough lunar landing. The Ranger program was designed to capitalize on t h e capability of the Atlas-Agena B . This is t h e first U. S. vehicle capable of launch ing a payload sufficiently heavy t o m a k e possible t h e survivable land ing of a scientific package on t h e moon. Since it w a s obvious t h a t no one flight could carry all of t h e various scientific instruments, t h e Ranger spacecraft w a s designed in t h e " b u s " concept. Approxi mately 70 per cent of t h e major system of the spacecraft, as re lated to cost, is the same for all Rangers. T h e remaining 30 per cent is appended scientific pack ages. When t h e launch vehicle, which is common to all flights, is
