Wmm^mmmm Radioactive compounds make it easy for you to detect as low as parts per billion. Here are a few of the m a n y compounds that have been used industrially:
AMORPHOUS CARBON
Rinco Rotating Vacuum-Type Evaporator
ETHYLENE OXIDE CH.C^HL.O
STYRENE Speed evaporation of solvents of low volatil ity four or five times—varying with solvents.
CeH 5 CH=C"Hî
VINYL ACETATE CH 3 COOCi 1 H=C l l H2
Adaptable for volumes of 1 ml to 500 ml. Utilizes the principle of the spreading out of a thin film over large area and subjecting to negative pressure. Can be used in single or multiple units. At 20°C, 30 ml of water will be evaporated in 30 minutes. Especially useful with biological extracts or heat-sensitive compounds; will operate faster with increased temperature, if sample permits. Consists of a monel metal shaft with a ~ψ 19/38 joint at lower end. Shaft rotates on oilite bronze bearings; Teflon ring seals; monel metal hous ing. Use with standard pump and trap, or standard aspirator. Flasks rotate at 93 r.p.m. 39474 — Rinco Rotating Vacuum-Type Evaporator, with f 19/38 joint to accommodate small flasks, such as 50 ml; with induction type motor; for 115 v., 60 cycles, A.C. each $114.50 39475—Rinco Evaporator, with brush-type motor . . $96.50 80820D—Adapter, "Pyrex" Brand, for adapting Τ 1 9 / 3 8 joint of Rinco Evaporator to larger flasks, having a f" 24/40 joint, each $1.83
ETHYLENE GLYCOL ΗΟΟ*Η2θ*Η,.ΟΗ
TRICHLOROETHYLENE C"HCI=C"CI2
FORMALDEHYDE STEARIC ACID CH3(CH2)MC"OOH
BENZENE C"«H 8
SODIUM LAURYL SULFATE CH3(CH2)wCH20S3303Na
TRICRESYL PHOSPHATE (TCP) (CH3(CeH4)0)3P3-O
DIBUTYL SULFIDE
New Rinco " Solvent Recovery C o n d e n s e r " Valuable accessory to Rinco Evaporator. Connects to flask of Rinco Evaporator with standard taper ground glass joints. Rotates with evaporating flask. Recovers in excess of 75% of solvent. Increases speed of evaporation 2 to 3 times. Easy to cool with cold water or ice. Protects vacuum pump and system from corrosive solvents. 39477—Solvent Recovery Condenser, standard size, 1000 ml, with 500 ml working capacity, "f 24/40 ground glass joints, (Other sizes available on request) Each . . . . $1 6.00
IODINATED OILS CH2„+1|i:
TRITIATED WATER THO
New Catalog D with complete list ings oi compounds and nuclear instruments, available on request.
ALOE SCIENTIFIC DIVISION 5655 LOS ANGELES DENVER
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Circle Nos. 50A-1, 50A-2 on Readers' Service Card, page 59 A
50 A
Circle No. 50 A-3 on Readers' Service Card, page 59 A
ANALYTICAL CHEMISTRY
