Chromatographic G r a d e
AMBERLITE Ion Exchange Resins AMBERLITE CG-120 (Na) Type I*, II**, III*** —strongly acidic cation exchange resin deriving activity from sulfonic acid groups. Application: Inorganic separations. Rare earths, Β vitamins. Peptides, Amino acids
AMBERLITE CG-50 (H) Type I*, II**, III*** — w e a k l y acidic cation exchange resin deriving activity from slightly ionized carboxylic-acid groups. Application: Transition elements, Amino acids, Flavanoids, Organic bases, Antibiotics
AMBERLITE CG-45 (OH) Type I*, II** — w e a k l y basic anion exchange resin deriving activity from primary, secondary and tertiary amine groups. Application: Amino Acids, Aliphatic and aromatic acids. M e t a l coordinate complexes. Vitamins
AMBERLITE CG-400 (CI) Type I*, II** —strongly basic anion exchange resin deriving activity from quaternary amine groups. Supplied as the chloride salt. Application: Halogens, Alkaloids, Vitamin B-complexes, Fatty acids *Type I resin ( 1 0 0 - 2 0 0 mesh) suited for • separation of materials differing a p p r e ciably in chemical properties. In such cases the particles are small enough to permit sharp separation, but coarse enough t o permit a reasonably fast flow rate. **Type II resin ( 2 0 0 - 4 0 0 mesh) suited for separation of materials related closely chemically, where sharp separations can only be achieved by using adsorbents o f extremely small particle size. * * * T y p e III resin ( 4 0 0 - 6 0 0 mesh) avail able in AMBERLITE C G - 1 2 0 and C G - 5 0 because of their specific utility in separat ing and identifying components of com plex amino acid mixtures. All meshes are U. S. Standard Screens. Laboratory quantities ( 2 5 lbs. or less) of AMBERLITE Chromatographic G r a d e ion exchange resins available exclusively through local offices of:
FISHER SCIENTIFIC CO. PRICES, INFORMATION UPON REQUEST. PURCHASES IN EXCESS OF 25 POUNDS SHOULD BE MADE THROUGH OUR OFFICE
Chemicals for Industry
ROHM & HAAS COMPANY THE RESINOUS PRODUCTS DIVISION Washington Square, Philadelphia 5, Pa. Representatives in principal foreign countries Circle No. 96 A on Readers' Service Card, page 97 A 96 A
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ANALYTICAL CHEMISTRY
MANUFACTURERS' LITERATURE
of neutron activation analysis in such fields as metallurgy, biochemistry, and geochemistry. Tracerlab, Inc. {Bul letin 94). L-27 Carbon- 14-Labeled
Compounds.
Twelve-page pamphlet announces pro duction of 38 new carbon-14-labeled compounds. Research Specialties Co. (Price list 1058). L-28 The Laboratory. Thirty-two-page booklet as No. 1 copy of volume 27 of The Laboratory has been issued. Fea ture article is profile of industrial re search and clinical laboratories of Philadelphia from colonial times to present. Fisher Scientific Co. 1-29 Organic Research Chemicals. Fourpage pamphlet lists, with prices for 10 to 500 grams, about 100 organic chemi cals available. Beacon Chemicals In dustries, Inc. (List SO). 1-30 Single-Pan Balances. Twelve-page bulletin describes and illustrates all of the Mettler line of high-speed directreading single-pan balances. Fisher Scientific Co. (Bulletin FS-207). L-31 Thermocouples. New catalog de scribes thermocouples for use in nuclear, missile, aircraft, industrial, and process fields. Aero Research Instrument Co. (Bulletin 3.8A). 1-32 Carbonized Laboratory Counter Tops.
An improved formula for carbonizing laboratory counter tops for protection against chemicals is announced by Hyde-Murphy Co. L-33 Chloride Metallurgy. Thirty-six-page illustrated brochure entitled "Chloride Metallurgy" describes physical and chemical properties, analytical methods, and reaction characteristics of several metal chlorides such as aluminum, antimony, boron, and titanium. Stauffer Chemical Co. L-34 Electrical Equipment. Four pages on an electropolisher, 16 pages on a flame chromatograph, 7 pages on an electrodialyzer, 8 pages on an electronic chassis, and 5 pages on electrophoresis apparatus are announced as available from Shandon Electronics, Ltd. L-35 Panel Meter. Data sheet on Model MM-3S panel meter describes it as one specifically designed for applications such as test equipment where styling is improved by use of a flush-front dial face. Marion Electrical Instrument Co. L-36
Flow Test Panel. Single sheet describes Model 10A1161 test panel consisting of low flow variable-area flowmeters piped together to give over 600 to 1 range of flow indication. Fischer & Porter Co. (Tech. bulletin 10A1161). L-37
Two-Channel Oscillograph. Fourpage bulletin describes Brush Mark II, a portable two-channel oscillograph complete with built-in amplifier. Brush Instruments (Bulletin Mark II). L-38 Electronic Controls. Nine sheets de scribe several instruments developed for electronic control of industrial proc ess variables. The Foxboro Co. (Press Kit). L-39 Calibration Unit. Description and in structions for building a calibration unit for use with radiation detection instruments are available from Tracerlab, Inc., Technical Publications Dept. L-40
Laboratory Flowrator Kit. Single sheet describes laboratory Flowrator kit consisting of three all-glass variablearea flowmeters with standard hose connections mounted in light-weight carrying case. Fischer & Porter, Ltd. (Spec, sheet 10A1027A-LK). L-41 Nonaqueous Titrations. An 8-page data sheet shows the chemist how to perform nonaqueous titrations with speed, simplicity, and much less equip ment than required for aqueous meth ods. Beckman/Scientific and Process Instruments Division (Data sheet— pH 83-M10). L-42 Mobile Testing Laboratories. Six teen-page illustrated brochure describes a line of mobile testing laboratories de signed to be of value for soil studies and quality control of concrete and asphalt. This is of interest to state and county highway departments as well as consulting engineers and testing labora tories. Soiltest, Inc. (Brochure ML100). L-43 Radio-Frequency Voltmeter. Eightpage bulletin and condensed specifica tion sheet on model RFV radio-fre quency voltmeter is released by Sensiive Research Instrument Corp. L-44 Electronics Catalog. New 452-page 1959 catalog of electronic parts and equipment, listing over 32,000 items, is released by Allied Radio Corp. (Cata log 180). L-45 Stirrer with Cone Drive. Twelvepage catalog describes many new pieces of laboratory equipment, including a new stirrer with cone drive that varies speed mechanically, optical goniom eters, portable flash evaporators, etc. Arthur S. LaPine & Co. L-46 Silicone Antifoams. New brochure with information on the chemical prop erties of silicon antifoams and the na-' ture of foaming systems is available on request from Hodag Chemical Corp. L-47
