is discussed in this catalog. All equipment is CFC free; models have temperature ranges from —30 °C to + 200 °C with accuracy of ±0.01 °C and come with a choice of program mable, digital, standard, or analog controllers. PolyScience 115
EC 1000 pH/ORP Process Monitoring Systems
Capillary electrophoresis. Two publication notes discuss the analy sis of inorganic cations and free metals in solution by capillary elec trophoresis. Application Note 91 covers the analysis of inorganic cat ions; Technical Note 35 covers the analysis of free metals in solution. These notes include sections on useful equipment, conditions, solu tions, and reagents. Dionex 116
Forget g r a b sampling! If y o u ' r e looking for a w a y to improve treat ment performance, c o n t r o l corrosion or g a u g e the efficiency of your d i s i n f e c t i o n processes, there's no substitute for contin uous on-line monitor ing w i t h EClOOO Process pH and Process O R P systems. For m o r e i n f o r m a t i o n , call 1 - 8 0 0 - 2 2 7 - 4 2 2 4 .
HACH
HACH COMPANY P.O. Box 389 Loveland, CO 80539
S-A273 REFER TO KEY NO. 9
NEWS FROM THE
FRONTIERS OF RESEARCH
Soil vapor extraction system. A 4-page brochure describes VACPAC, a technique for the re moval of hydrocarbon contami nants through the creation of a vac uum. Bisco Environmental 117
ψ
Environmental testing supplies. A 40-page catalog discusses mem branes for water microbiology, me dia for the detection of total coliforms and E. coli, a m e m b r a n e filtration method for monitoring drinking water, hazardous waste equipment, and test kits for lab and on-site analysis of environmental contaminants. Millipore 118
ACS
Regulatory compliance. The CAS Surveyor: Regulatory Compliance is a convenient CD-ROM version of chemicals regulated by EPA, Envi ronment Canada, and the European Commission. This is a useful source for compliance information. Call (800) 753-4227. Chemical Abstracts Service 119
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Environ. Sci. Technol., Vol. 28, No. 12, 1994
543 A