BECKMAN INSTRUMENTS, INC

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Progress and Profit through Instrumentation

BECKMAN

Sugar Colorimeter New Air Dryer Glass Electrodes

BULLETIN DIGEST NUMBER 2

SUGAR WHITENESS MEASUREMENTS w i t h COLORIMETER

Here is the new Beckman Sugar Colori­ meter—it provides a quick and accurate way to describe sugar whiteness so that everyone using it can obtain Color In­ dex Numbers which are directly com­ parable. Now suppliers and users can talk the same language, with great ease! The Beckman Sugar Colorimeter was designed in close cooperation with the sugar industry . . . three years and sev­ eral model changes were required be­ fore the industry committee gave its okay. Their latest report, to be released soon, says ". . . gives close agreement with the Beckman Model DU Spectro­ photometer!' The Sugar Colorimeter comes complete with filters and two 10cm sample cells . . . all ready to use. The instrument is standardized with a colorless sugar so­ lution or with distilled water . . . the sugar sample is dissolved in distilled

water and absorbancy measured with the 420 τημ filter. Turbidity is meas­ ured with the 720 ηιμ filter, and sub­ tracted from the first reading. Applying a simple formula gives Color Index . . . a number which will have the same meaning to a sugar refiner, a soft drink bottler, an ice cream maker, a baker or a confectioner. A reprint of the first report of the sugar industry committee is yours for the asking. - r^ Your Beckman dealer will be glad to show you the Sugar Colorimeter in action . . . he'll even bring the sugar.

NEW A I R

DRYER

The new Beckman Automatic Air Dry­ er, No. 8250, is now available. Fully automatic, it removes virtually all mois­

ture from the air passing through it. Designed for use with the Beckman IR-2A . . . Infrared Spectrophotometer, the Air Dryer may be also used with other infrared spectrophotometers. An­ other use is in low temperature studies, where moisture condenses on glass­ ware and windows . . . interfering with the reaction, or making it impossible to see what goes on. Used in place of bottled dry nitrogen, the unit can pay for itself in a year! The Air Dryer is invaluable wherever deliquescent materials are being handled . . in balance enclosures, for example . . . or wherever reactions must be carried on in a moisture-free at­ mosphere. It dries the air to less than 1% relative humid­ ity. Recent tests i n d i c a t e it m a y also b e u s e d t o remove C 0 2 . The Air Dryer is on the job 24 hours a day. Activated alumina is the drying agent . . . 100 cu. ft. of air per hour passes through, and is delivered to the desired enclosure. At midnight . . . or any pre-selected t i m e . . . the alumina is regenerated, automatically. The blower is turned off . . . the alumina heated to 400° C for drying . . . the moist air is blown out to the atmosphere. This continues for nearly two hours . . . then the heaters turn off and the alumina cools for two hours. Then the operating cycle resumes . . . dry air is once again delivered to the enclosed space . . . ready for you to come to work in the morning! #8250 Automatic Air Dryer, for 110 volt, 60 cycle, AC current. 9 in. wide, 13J4 in. deep, 2734 in. high. Weight 50 lbs. Price FOB Fullerton, California, $425.00. Delivery about 90 days.

NEW GLASS ELECTRODE FOR HIGH-pH MEASUREMENTS A new kind of pH-sensitive glass has been developed by the Beckman Di­ vision of Beckman Instruments, Inc. Known as "Type E-2" glass, the new material makes JIUSM'IIII· a better elec-

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trode for high-pH measurements, es­ pecially in the range above pH 10. At the same time, Type E-2 glass elec­ trodes are useful over the entire 0-14 pH range, at temperatures from 15 to 100° C. They offer improved resistance to acids, to surface deterioration, and to aging, as well as to alkalies. Type E - 2 glass electrodes re­ place the original Beckman alkaliresistant Type Ε glass electrodes. They are available in these models: Number 290-72 1190-72 4990-73 8990-72 5 in. 5 in. Body length 2 % in. 5 in. 30 in. 30 in. 10 ft. Lead length 6 in. Price $11.00 $14.00 $14.00 $15.00

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(a) primarily for use on door of Beckman Model G p H Meter (b) primarily for use external to Beckman Model G p H Meter (c) primarily for use with Beckman Models Μ, Ν, Η, Η-2 pH Meter

Your'Beckman Dealer will be glad to demonstrate the Sugar Colorimeter as well as the Clinical Colorimeter, Flame Photometer, pH Meters and Spectrophotometers. For further in­ formation on the Sugar Colorimeter ask for Bulletin 67-15. Beckman Division BECKMAN INSTRUMENTS, INC. Fullerton 1, California

For further information,, circle numbers 23 A-1, 23 A-2, 23 A-3 on Readers' Service Card, page 61 A

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For further information, circle number 22 A on Readers' Service Card, page 61 A

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