EM Laboratories, Inc

Darmstadt,. West Germany. 500 Executive. Boulevard. Elmsford,. N.Y. 10523. (914) 592-4660. CIRCLE 68 ON READER SERVICE CARD. EM Laboratories, Inc...
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TLC Plasticbacked plates make your job

Pre­ packed Columns HPLCHigh Performance at Low Cost

LiChrosorb® Analysis of a pharmaceutical preparation Column packing: LiChrosorb" SI 60

Increased load factors of EM plastic-backed TLC layers make it easier for you to identify and collect results. Also, you can select from a variety of sorbents and layer thicknesses, depending- upon your specific application. And EM plastic-backed plates incorporate our own specially formulated TLC layers which are tough and stable and possess advantages for storage and shipping.

LiChrospher — totally porous HPLC column packings of spherical shape LiChrospher SI 100 LiChrospher SI 500 LiChrospher SI 1000 mean particle size 10 μπι

All of EM's chromatography products are designed to be compatible in EM's system concept of chromatography. This means that you can easily switch from TLC . . . to column chromatography . . . to pre-packed columns . . . to HPLC . . . to bulk sorbents for process chromatography . . . all the while maintaining uniform chromatographic characteristics among your sorbents.

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LiChrosorb— totally porous HPLC column packings of irregular shape LiChrosorb SI 60 LiChrosorb SI 100 LiChrosorb Alox Τ LiChrosorb SI 60 silanized mean particle sizes: 5 μπι, 10 μπι, 30 μπι

Specify EM pre-coated TLC products. They set the standard for quality and compatibility in the industry. Available from selected distributors throughout the country.

E M Laboratories, I n c . a s s o c i a t e of E. Merck. Darmstadt, West Germany

50O E x e c u t i v e B o u l e v a r d E l m s f o r d , N.Y. 1 0 5 2 3 (Θ14) 5 8 2 - 4 6 6 0

CIRCLE 08 ON READER SERVICE CARD

Sorbents for High Performance Liquid Chromatography

PERISORB®—a porous-layer column packing material for high speed and high resolution LC.

E M Laboratories, I n c . a s s o c i a t e of E. Merck, Darmstadt, West Germany

500 Executive Boulevard Elmsford. N.Y. 10523 19141 5Θ2-46Θ0

CIRCLE 69 ON READER SERVICE CARD

E M Laboratories, I n c . E. Merck, Darmstadt, West Germany a s s o c i a t e of

500 Executive Boulevard E l m e f o r d , N.Y. 1 0 5 2 3 (914) 6 9 2 48ΘΟ

CIRCLE 7 0 O N READER SERVICE CARD

ANALYTICAL CHEMISTRY, VOL. 47, NO. 12, OCTOBER 1975 · 1105A