NEW PRODUCTS Micrometer Syringe An attachment for the Agla mi crometer syringe, which also fits some other syringes, dispenses a predeter mined volume. Pressing a button on the end of a 20-inch cable release causes a small pawl and ratchet to advance the micrometer head through a specified distance. The volume may be set for 0.4, 0.8, or 1.2 μ\. with an accuracy of 2%. Scientifica & Cook Electronics Ltd., 148 St. Dunstan's Ave., Acton, London, W.3, England. 407
Model 20 Variable Angle Single Reflection Attachment for Perkin-Elmer 202 Spectrophotometers
Model 14 Multiple Internal Reflection Attachment for Cary Spectrophotometers
A New Dimension For Ultraviolet SpectroscopyINTERNAL REFLECTION ANALYSIS Mobile refrigeration unit is designed to hold the company's rectangular 250-tube fraction collector and keep the collected fractions at a selected temperature from ambient to 4 ° C. Model 133A also has provisions for mounting up to four external columns which may be heated as well as cooled by an independently controlled temperature system that has a range of 4° to 50° C. Beckman Instru ments, Inc., Spinco Division, 1117 California Ave., Palo Alto, Calif. 408 Electron Capture Detector A pin-cup design electron capture de tector using nickel-63 as a radioactive source permits routine operation at 300° C. The Nickel-63 detector is said to exhibit all the electron capture char acteristics of conventional parallel plate detectors which use tritium. MicroTck Instruments, Inc., P.O. Box 15409, Baton Rouge, La. 409
What has already been done in the infrared with internal reflection spectroscopy (ATR) may now be possible in the Ultraviolet with these new attachments. The internal reflection technique shows great promise for the ultraviolet analysis of solids and strongly absorbing liquids — samples that have always been difficult to handle by transmission methods. The Model 20 Variable Angle, Single Reflection Attachment may be used for index of refraction vs. wavelength measurements and specular reflection as well as internal reflection. The Model 14 Multiple Reflection Attachment provides increased sensi tivity for analysis on such samples as coatings, treated surfaces, dyes, etc. Both accessories fit on most of the recording ultraviolet spectro photometers commonly in use. Though UV-ATR is still in its infancy, the potential is such that every well-equipped UV laboratory will find ample use for one or both of these accessories. VISIT US AT PITTSBURGH CONFERENCE - BOOTHS F-53 and F-54.
WILKS S C I E N T I F I C
CORPORATION
SOUTH
INJORWALK ·
CONNECTICUT
Circle No. 51 on Readers' Service Card VOL.
38, NO. 2, FEBRUARY 1966
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199 A
