CombiSep Merger

February 23, 2007

Welcome valued customers and partners!

We are pleased to announce that CombiSep Inc. has merged with Advanced Analytical Technologies, Inc. (AATI). This merger will afford both AATI and CombiSep added technical, marketing, and financial strength. Equally beneficial, AATI’s access to equity markets and operating expertise represent significant growth opportunities for CombiSep.  We believe that this merger will enable us to provide even greater value to you, our customers and partners.

AATI and CombiSep share a strategic focus of expansion into the life science R&D and process control markets, which includes a longer term initiative into nano-biosolutions. In addition, our growth objectives are supported by a dynamic board of directors and a highly respected scientific advisory board, whose members have provided us access to new capital necessary to ensure our leadership position in our targeted life science markets.

While we are committed to growing our company, we are equally committed to your continued success and growth as a valued customer and/or partner. We will strive to strengthen our understanding of your needs in order to provide you with new solutions that solve your critical business challenges.

As we integrate our two companies, we foresee nothing that will interfere with our level of service to you, and we promise that all associates will work diligently to ensure your continued trust and satisfaction with Advanced Analytical.

Sincerely,

Steven J. Lasky CEO Advanced Analytical Technologies, Inc.

Mark F. McDonald President Advanced Analytical Technologies, Inc.