INSTRUMENTATION
FREE samples ο/ E'-D /i/ter paper for Chromatography and Electrophoresis Readily
available
in a variety
o f grades
and sizes
Of the 33 grades of filter paper that are regularly produced in Filtertown, most possess the high de grees of uniformity and purity, that are essential characteristics for filter paper selected for use in chromatography or electrophoresis. In point of fact, E-D filter papers are most favor ably known for dependability, neutrality, and low ash content. For two dimensional chromatography and electro phoresis—the most popular grades are 301, 609, 613 and Purity 7. They represent the thin, medium, and heavy grades which provide rapid, medium, or slow flow. Usually purchased in sheets. All sizes can be supplied including, of course, the very popular 18J4" χ 22y2". For single dimensional chromatography, rolls or strips are most frequently used. Rolls up to 12" wide are ordinarily supplied in lengths of 600 feet. Strips from 3^2" to 12" wide, 22" long. Other sizes available. We have prepared a Sample Kit for your use to help you determine which grade—or grades—suit your purposes best. No charge or obligation. Simply send in the coupon below and we will promptly forward this Sample Kit to you.
The Eaton-Dikeman Company FILTERTOWN
MT. HOLLY SPRINGS, PENNA. THE E A T O N - D I K E M A N C O M P A N Y FILTERTOWN MT. HOLLY SPRINGS, PENNA. 1 1 Send me the Sample Kit of E-D filter papers for Chromatography and Electro phoresis in sheets, 18'/4 " χ 22'Λ ". Send me samples of E-D filter paper to fit equipment I have checked. 3 ! Cabinet Unit Π Square jar Π Rectangular jar Π Round jar—12" Π Round jar—10 " Π Round j a r — 6 " Q Tube Units—4" Π Tube Units—2%" Π Electrophoresis Units D Roll—1" Π Roll— Ά" My
name_
_r/f/e_
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City.
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-State.
For further information, circle number 64 A on Readers' Service Card, page 83 A
64A
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ANALYTICAL CHEMISTRY
electrical power input to the electronic control unit, and the sampling input, distilled water input, and waste outlet on the chemical unit (by special bulk head connectors). The power input to the electronic control unit is taken through a packed gland to a distribution panel at the bottom of the cubicle, and led from there to the chassis in the upper part of the unit. An SA three-pin socket on the distribution panel gives an outlet for connecting a soldering iron or any other accessory when repairs or ad justments are being carried out on the unit. The chassis in the electronic control unit are easily withdrawn, all the connections to the unit cable form being made by multiple plug and socket connectors. The subframe in the chemical unit can be pulled clear of the cubicle by undoing six bolts and the liquid connectors. The intercon necting cables enter both the units through packed glands, and are joined to the unit cable forms by means of comb-type farming strips and screw terminal blocks. All the glassware in the chemical unit, being fitted with spherical groundglass joints (12 mm.) held by spring clips, is readily changed if necessary. External piping connectors are for l / 4 inch/0.531 pipes. Electrical requirements are 110/220 or 200 to 250 volts a.c. at 150 va. The equipment can be equipped to oper ate on 40, 50, or 60 cycles. To reduce the risk of accidents, no supply of over 50 volts is led into the chemical unit. Applications The Titromatic Analyser has been used for continuous and automatic determination of ammonia content of the wash water in an ammonia scrubber for control of water rate ; concentration of plant streams in raw acid or base manufacture; hardness and other chemi cal properties of feed water in auto matic boiler houses; and concentration of commercial liquors in the soft drink industry. It is claimed that with this equip ment three chemists on shift work in 24 hours can be permanently released for other work. It seems to us that this accomplishes the true role of an autotitrator in that all functions, in cluding sampling, rinsing, refilling, etc., are accomplished entirely without at tention. For a routine, purely repeti tive task, such machinery is com pletely justified. This equipment will be shown at the 26th Annual Chemical Exposition at New York, December 2 to 6.
