ONE-PIECE

M I C R O K J E L D A H L DISTILLING APPARATUS

With Electric Steam Generator

KJELDAHL DISTILLING APPARATUS, MICRO, One-Piece Model, with Electric Steam Generator, Α. Η. Τ. Co. Specification, in accordance with the specifications of the Committee on Microchemi-cal Apparatus, Division of Analytical Chemistry, American Chemical Society. See Analytical Chemistry, Vol. 23, No. 3 (March 1957), pp. 527-528. Consisting of a principal glass part made of Pyrex brand glass, which incorporates a steam jacketed distillation flask with spray traps, filling funnel and condenser, electrically heated steam generator, tripod support and transformer for heat regulation.

The distilling flask proper, i.e., inner jacket of principal glass part, is 175 m m long, with body 35 mm diameter, enclosed in a steam jacket 225 mm long X 60 m m outside diameter. The flask has two T-shaped traps at top in separate bulbs, 55 mm diameter, for effectively retarding alkali spray, and is sealed to a vertical, all-glass, West type condenser, 250 mm long X 18 m m outside diameter. Side filling funnel, with standard taper No. 4 stopcock, empties into bottom of distilling flask through a bent glass tube, 7 mm diameter, through which steam in outer jacket also enters distilling flask. Condensate is drained through side arm with standard taper No. 4 stopcock at bottom of outer jacket. Overall dimensions of principal glass part approximately 520 m m high X 290 mm maximum width; interchangeable ground glass joint for connection to steam generator, inner member size standard taper 34/45.

The steam generator consists of a reaction kettle of Pyrex brand glass, with cover clamp, 2000 ml capacity, with rigidly suspended Electric Immersion Heater, 750-watt. The heating element is near bottom of reaction flask enclosed in a horizontal one-and-one-half turn coil of Stainless steel tubing. Heater terminals are connected within a two-piece, dismountable Bakélite fitting to a 3-ft. cord with plug. A Variable Autotransformer permits convenient control of boiling rate by providing continuous wattage selection up to rated capacity of heating element. Complete with tripod for stable support of steam generator and solid rubber stopper for fourth opening in steam generator cover, through which water is replenished.

7497.

7497. Kjeldahl Distilling Apparatus, Micro, One-Piece Model, with Electric Steam Generator, A.H.T. Co. Specification, complete as above described, including tripod, 8 inches diameter, and Transformer. Power con­sumption 750 watts. For use on 115 volts, 50 or 60 cycles, single phase, a.c. only 160.66

Accessory and Replacement Parts

7497-C. Principal Glass Part, only, as supplied with 7497, of Pyrex brand glass, with standard taper 34/45 interchangeable ground jo in t . . 84.00

7497-E. Steam Generator (Kettle), Electric, only, as supplied with 7497. Complete with reaction flask with c lamp, 2000 ml capacity, and 7497-F Immersion Heater. With 3-ft. cord and plug for connection to suitable power regulator; for use on 115 volts, a.c. or d.c. Without transformer or tripod 52.00

7497-F. Hea te r , Immersion, Return-Bend Tubular T y p e , Electric' only, as supplied with 7497-E. Designed for use in reaction flask, 2000 ml capacity. Enclosed in Stainless steel tubing, 9/32-inch diameter , with heating element in horizontal, one-and-one-half-turn coil, 43/i inches overall diameter. Unheated terminal arms are parallel, 31/2 inches apart, rising from opposite sides of coil. Overall height 91/4 inches. Com­plete with two-piece, Bakélite terminal mounting block, with 3-ft. cord and plug for connection to suitable power regulator, and two one-hole rubber stoppers for mounting heater terminals in openings of reaction flask cover. With directions for mounting. Power consumption 750 watts; for use on 115 volts, a.c. or d.c 17.5Θ

5450-K. Cover Clamp, only 9.35

SYMBOL OF QUALITY

A.H.T. CO. LABORATORY APPARATUS I

ARTHUR H. THOMAS COMPANY Laboratory Apparatus Reagants

WEST WASHINGTON SQUARE PHILADELPHIA 5, PA. Teletype Services: Western Union WUX and Bell System PH-72

18 A

For fu r ther in format ion, c i rc le number 18 A on Readers' Service Card, page 41 A

A N A L Y T I C A L C H E M I S T R Y

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SPECIFICATION