Modern Coulometry with Modern Instrumentation Premium quality, solid-state components for long-term reliability and stability Simplified controls Direct readouts volt= lmg)
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•
• • •
Controlled-Roteiitial Coulometer System Model
3
•
$3852
Self-checking configuration Modular, plug-in Potentiostat and Integrator available separately Negligible zero drifts
0.1% Accuracy and Precision with mg amounts of: Ag As Au Br~ Cd Cl~ Cr Cu Eu Fe H202 I- In Ir Mn Mo Ni Nf Np Pb Pu Ru Sb Sn Te TI U V Zn Numerous organic compounds Preparative Electrolysis Mechanistic and Formal E° Studies
• Condensed Specifications: 1 ohm POTENTIOSTAT—Output: ± 24V, ± 400mA, Z DCO.L. Gain 750kHz, adjustable response 105, f„ Zero Stability: ± 0.5 mV long term INTEGRATOR—Ranges: 1.9 and 19 coulombs Drift: ± 0.5 mV/15 min., stable long term Calibration Stability: ± 0.1%/year =
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M-T ELECTRONICS CO. 536-fl Lewelling Blvd. San Leandro, Calif. 94579 Phone 415/357-5262 Circle No. 88 on Readers’ Service Card
ANALYTICAL MICRO MILL 20-50 ML SAMPLES GROUND INSTANTLY Stainless steel blade rotating at speeds up to 20,000 r.p.m. reduces small samples to minute size in a matter of moments. Ultimate particle size depends upon sample material and length of run. Grinding chamber is closed during milling operation to rule out sample loss. Built-in safety switch assures operator
protection. Stainless steel chamber may be quickly disassembled for autoclaving or cleaning. Serrated hose connections to jacket surrounding grinding chamber permit circulating cold tap water or direct coupling with constant temperature circulator.
Please send your free booklet “Is Glass the Answer?” and your Glass Fiber Filter Paper Data Sheet. NameInstitution, Street,
City_
-Zip,
-State,
m
reeve
angel
H. Reeve Angel & Co., Inc. Sole Distributor in North America 9 Bridewell Place, Clifton, New Jersey 07014 Phone: (201) 773-5800 Whatman
is the registered trademark
Maidstone, Kent, England.
Circle No. 59
114 A
·
on Readers'
of
W,
