Other outstanding FARRAND

---

Other outstanding FARRAND ANALYTICAL INSTRUMENTS

New Manual Spectrofluorometer

Highest sensitivity and resolution at low cost. 150-watt xenon arc source with off-axis ellipsoidal mirror; two f/3.5 grating monochromators; sensitive detector and solid-state electronics. Accessories include TLC scanning attachment, polarizers, flow cells, multiple sample turrets, strip-chart recorder output. Circle No. 185 on Readers’ Service Card

Ratio Fluorometer For quantitative analysis of extremely low concentrations of fluorescent material. Provides direct readout and ratio recording capability with high sensitivity. Fiveelement quartz optical system; stabilized mercury lamp; two matched and shielded photomultipliers for stability. Sensitivity: 10 parts per trillion of quinine Sulfate full scale. Circle No. 187 on Reader's Service Card Circle No. 188 on Readers’ Service Card ->-

Grating Monochromators

The Foci-Flex is a low-cost, quality instrument available with gratings of 14,400 or 28,800 lines/inch. 200-785 nm or 215-800 nm range; f/5.3 optical system; interchangeable slits; 1 nm resolution. Ideal for systems operation, educational, experimental uses. B The Standard unit has f/3.5 response with less than 0.5% stray light. Available gratings blazed for maximum efficiency from 0.2 nm to 3 nm. Available with 14,400 or 28,800 lines/inch rulings. Modular construction permits systems building, including lamp, lamp power supply, photometer-detector. A

Spectrofluorometer, MK-1

Advanced concept that has become the industry standard in fluorescence analyses. Instrument combines outstanding sensitivity (1 part per trillion of quinine sulfate) and resolution (0.5 nm with standard gratings) with automatic scanning capability for excitation and emission. Built-in electronics for a broad range of accessories. Circle No. 186 on Readers' Service Card

Automated Turret Spectrofluorometer !AT^

Unique instrument provides rapid, ultra-sensitive spectrofluorometry for the screening of heroin addicts. Used by leading forensic and clinical laboratories, for batch analysis. Continuous automatic scanning monochromator; unattended operation gives sequential stripchart recording of 16 samples; processing of up to 150 samples per hour; selected spectral range 100 nm span adjustable from 200 to 700 nm; high-intensity mercury lamp.

Photometer Incorporates stabilized solid-state amplifier/microPhotometer utilizes 9 sensitivity ranges, independent gain control, and zero suppression controls. Recorder output available. Compatible with all Farrand and other monochromatic systems and equipment. Instrumentation problems? We will assist you in developing fluorescence instrumentation methods suited to your own laboratory requirements. Telephone our Applications Laboratory ammeter.

at 914-668-9393.

Circle No. 190 on Readers' Service Card

Circle No. 189 on Readers' Service Card

ANALYTICAL CHEMISTRY, VOL. 42, NO. 4, APRIL 1970

·

47 A