Horizon Technology and Waters Corporation Introduce
New Sample Preparation Technology for Water Analysis

Oasis® HLB Disk Creates Greater Efficiencies for the Environmental Laboratory

Salem, NH, November 3, 2008 — Horizon Technology, Inc., and Waters Corporation have introduced the Oasis HLB Disk, a solid-phase sample preparation product for the analysis of EPA Method 8270 and 1694, endocrine disruptors, personal care products, pharmaceutical residues in surface water and drinking water, and other emerging contaminants. The single-use disks are designed to handle larger and dirtier samples leading to greater throughput for the environmental laboratory.

The water-wettable Oasis HLB Disks enhance the retention of polar compounds and work with a wide spectrum of compounds and extraction solvents for samples with a pH range of 1 - 14. Oasis HLB Disks are built on the Horizon Technology® Atlantic® Disk platform, widely used by environmental laboratories analyzing samples with gas and liquid chromatography and mass spectrometry in compliance with approved methods of analysis. With the introduction of Oasis HLB Disks, the Oasis HLB sorbent for solid-phase extraction protocols is now available in a disk format.

The Oasis HLB Disks incorporate the first hydrophilic-lipophilic-balanced water-wettable copolymer optimal for any sample cleanup and are unique in their purity, reproducibility, stability, and retention characteristics. They are designed for use with the Horizon Technology SPE-DEX® 4790 Automated Extractor System.

About Horizon Technology, Inc.
Horizon Technology is a world leader of automated sample preparation systems and consumables for a wide range of trace organic compounds and oil & grease in aqueous samples. Semi-volatile organic compounds, including pesticides, herbicides, TPHs, PAHs, PCBs, hormones, endocrine disruptors, pharmaceutical by-products and numerous other trace organics are being monitored and tested globally. Horizon Technology's products provide automated sample preparation solutions to allow laboratories to process large volumes of the "whole", particulate laden water sample, enabling the achievement of low detection levels. Laboratories worldwide have found Horizon's family of automated sample preparation systems increase productivity, improve the accuracy of their results, and lower operating costs. For more information on the Horizon Technology integrated family of automated extraction, drying and concentration products visit: www.horizontechinc.com.

About Waters Corporation
Waters Corporation creates business advantages for laboratory-dependent organizations by delivering practical and sustainable innovation to enable significant advancements in such areas as healthcare delivery, environmental management, food safety, and water quality worldwide. Pioneering a connected portfolio of separations science, laboratory information management, mass spectrometry and thermal analysis, Waters technology breakthroughs and laboratory solutions provide an enduring platform for customer success. With revenue of $1.47 billion in 2007 and 5,000 employees, Waters is driving scientific discovery and operational excellence for customers worldwide. For more information on Waters products for environmental analysis, visit: www.waters.com/environment.

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Horizon Technology and Atlantic are trademarks of Horizon Technology.
Waters and Oasis are trademarks of Waters Corporation.