LABINDUSTRIES - Analytical Chemistry (ACS Publications)

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Ultracentrifuges. tions" brochure.

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"Frac­ 5

Vacuum Units. Light sources, detec­ tors, monochromators. 117 Valves. Teflon needle valve for gas chromatography. 61 Valves. Info connections.

on line of valves and 150

X-Ray Units. Catalog on units for fluorescence and diffraction. 107 Ware, Glass. Catalog heavy duty beakers.

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WATERS LIQUID CHROMATOGRAPHY MONITOR

Ware, Glass. Catalog details line of graduated cylinders. 186 Ware, Glass. Erlenmeyer

Catalog on flasks.

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Ware, Glass. umetric

Catalog on line of vol­ flasks. 185

Ware, Glass. ers offered.

Catalog on line of beak­ 183

Ware, Glass. ware offered.

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Ware, Glass. Catalog on greaseless high-vacuum ware.

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COLUMN

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Ware, Plastic. Specs on bushing type adapters offered. 37 Ware, Platinum. Catalog on line of platinum apparatus, equipment, chem­ M icals.

AQUAMETRY ADVANCE No False End Points Possible With L/I's A q u a m e t r y Apparatus Here's the first aquametry apparatus to combine high precision, easy operation and low cost in one compact unit. Karl Fischer end points are precisely determined on L/I's self-powered colorcoded meter electrode indicator. (A twolambda excess of K-F reagent in a 100 ml methanol reaction is detectable.) L/I's apparatus is oderless and mois­ ture proof. Uses original K-F reagent bottle as reservoir. Includes 1 ml "piggy­ back" burette for high accuracy over wide range without changing bottles. These and other features make K-F water determinations the simplest, most pre­ cise yet. Price: $225. Delivery stock, satisfac­ tion guaranteed. For detailed data, write to

LABINDUSTRIES 1740 University A v e n u e Berkeley 3 , California Phone TH 3 - 0 2 2 0 Circle No. 102 an Readers' Service Card

188 A

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ANALYTICAL CHEMISTRY

Ware, Stone. Info on line of stone surface material offered. 65

Product Capsules an AC service for subscribers Presenting short "refreshers" on last month's ads in order to help you obtain free information of value to both you and your company. Simply circle corresponding key numbers in the "Product Capsules" portion of the reply card on page 158 B.

T h e liquid c h r o m a t o g r a p h y t e c h ­ n i q u e is a p a r t i c u l a r l y v a l u a b l e a n a ­ lytical tool t o t h e f o o d , d r u g , rubber, medical, pharmaceutical and heavy c h e m i c a l i n d u s t r y because it allows analysis w i t h o u t subjecting t h e s a m ­ ple t o h i g h t e m p e r a t u r e s w h i c h m a y d e s t r o y or break d o w n t h e t r u e s a m ­ ple In l i q u i d c h r o m a t o g r a p h y t h e s a m p l e is i n t r o d u c e d t o t h e c o l u m n in i t s t r u e l i q u i d s t a t e o r a s a s o l i d d i s s o l v e d in a l i q u i d . A n e l u t m g s o l ­ vent then carries t h e sample t h r o u g h the column. The development of this technique has lagged f a r behind g a s c h r o m a t o g r a p h y because of t h e lack of a universal, sensitive column m o n ­ itoring device. The Waters Miniature Liquid Chromatography Monitor (LCM) w a s d e v e l o p e d in c l o s e c o - o p e r a t i o n w i t h the Proctor & Gamble Company, Cin­ c i n n a t i , Ohio t o provide this m u c h needed simple, inexpensive, small volume, versatile monitor. T o m a k e installation easy and obtain rapid re­ s p o n s e t h e W a t e r s L C M is d e s i g n e d for integral mounting with t h e column.

LOW COST $525.00 SMALL VOLUME 0.37 cc FAST RESPONSE 2 SEC. FULL SCALE WATERS ASSOC. INC. 45 FRANKLIN ST. FRAMINGHAM, MASS. AREA

CODE 6 1 7

Circle No. 223 on Readers' Service Card