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GFS has moved into the world of submicron polymer technology by acquiring the calibration standards line developed and marketed by APS Analytical Standards, Inc. (Redwood City, CA) over the last twenty years. The value of these standards lies in their potential utility in almost every type of optical or visual calibration process. Key applications involve instruments that operate on the principles of light scattering, transmittance or absorbance, including turbidimeters, nephelometers, colorimeters, spectrophotometers, and clinical analyzers. To date, the largest application is as a calibration standard for turbidity analysis in water treatment plants as required by the 1976 Safe Drinking Water Act. The GFS AMCO Clear® standards have several advantages over formazin-based standards. The mean particle diameter of 0.2 µm and particle size distribution of 0.1- 0.3 µm ensures consistent light scattering characteristics and provides the advantage of a permanent suspension. The new GFS APS standards are significantly more stable and, unlike formazin-based standards, can be used for consistent calibration check of less than one NTU (nephelometric turbidity unit). This is important because the EPA requires turbidity values not to exceed 0.3 NTU for surface source drinking water. GFS maintains the strictest standards of ISO-9000 conformance. Generated in an ultra-pure aqueous medium, these permanent suspensions provide the analyst with several significant benefits: • Long-term stability • Ease of use, storage • Non-toxic character • Accuracy to +/- 1% of stated value from lot-to-lot • Uniformity of particle size, shape and distribution from lot-to-lot GFS now provides the most comprehensive line of standards, analytical reagents and instrumentation for water treatment facilities worldwide. By bringing together the 20 years of turbidity experience from APS Analytical Standards with over 75 years of GFS chemical manufacturing experience, customers can rely on GFS for the highest quality, freshest, most stable and reliable products on the market. As an ISO-9000 certified organization, GFS can give you the assurance of consistent product every time. AMCO Clear® standards are certified for use in turbidimeters and haze meters by the following regulatory bodies: • EPA Federal Registry, Vol. 47, #42, March 3, 1982 to present • Standard Methods of Water & Wastewater, APHA-AWWAWPOCF, 16th-20th Edition to present • ASTM, D1889-00, D6698-01, D6855-03 • ASBC - American Society of Brewing Chemists 1986 to present • Analytica - EBC, 4th Edition, 1987 to present AMCO Clear® / AMCO AEPA® is an EPA-approved turbidity primary standard that is safe, non-toxic and disposable. It is easy-to-use with no dilution or prep work required, and is available in a wide range of values. It is NIST Traceable, and its inherent stability means it does not settle out of suspension. It has a guaranteed one year shelf life. The convenient submicron polymer suspensions are the most reliable and reproducible primary calibration standards currently approved by the EPA for water testing, and preferred by instrument manufacturers and the U.S.G.S. for their intrinsic uniform optical properties. APS Analytical Standards are Certified Reference Standards (CRS) for use as primary standards for the calibration of: Turbidimeters – measuring turbidity (NTU units) Haze meters (ISO) – measuring haze (EBC units) Haze meters (ASBC) – measuring haze (FTU units) Suspended Solids Analyzer – measuring total suspended solids (PPM) Biomedical Instrumentation – measuring bacterial colony counts/protein/blood composition Visual Process Monitoring – visually measuring fermentation/ distillation Spectrophotometers – measuring percent absorbed and transmitted light or optical density The GFS AMCO Clear® standards program will continue to develop new products for the turbidity, spectrophotometric, consumer products,life-science, and materials science markets. Please contact us regarding opportunities that we might develop together for your benefit. Services To improve quality and delivery time further, GFS constructed a state-of-the-art lab complete with sophisticated air locks and filtration system, new tanks, new instruments and a new DI water system. GFS collaborates with and supports all major instrument manufacturers of online, benchtop, portable and in-situ turbidimeters. Our ability to custom produce calibration standards for individuals or companies sets us apart. We work with customers to quickly formulate products that address their specific needs. The solution may be as simple as replacing existing calibration standards with more precise, easier to use standards or as complex as developing standards for a new instrument. We make calibration standards for any analyzing instrument that operates under the principles of light scatter, absorbance, or attenuation. Our attention to detail allows you to standardize process control for multiple site manufacturing. GFS creates the instrument calibration standards and the SOP for quality control. Dedicated sales representatives, chemists and other technical staff are easily accessible to respond to your needs. GFS Chemicals' products for water treatment facilities include EPA approved polymer based calibration standards for turbidimeters, NIST Traceable calibration verification standards for spectrophotometers and colorimeters, meters, AA and ICP Standards, Environmental Grade Acids, reagents for chlorine analyzers. We also offer benchtop, online and portable turbidimeters, spectrophotometers, colorimeters, residual chlorine, and pH meters.These products and more are highlighted in the GFS Turbidity and Water Products catalog now available. Private Sector GFS services markets ranging from biomedical and pharmaceutical to beer, paper and pulp manufacturers. GFS products include NIST Traceable calibration verification standards for spectrophotometers and colorimeters,buffer solutions for pH meters McFarland equivalent standards both for visual and machine testing, ASBC and EBC approved standards for beer brewers, visual colored standards for direct processing analysis, EPA approved turbidity standards for water quality monitoring for surface and ground waters, electrical power plants and mining operations. Learn more about AMCO Clear® (previously AMCO AEPA®-1) products at www.AmcoClear.com Turbidimeters...and more We can help you to select the right turbidimeter and testing equipment for your application. We carry a complete line of portable, benchtop and online instruments from the following manufacturers: McVan Instruments Pty Ltd (in-situ or in-line monitoring) HF Scientific Inc.(turbidity and chlorine monitoring; streaming current) Lamotte (portable/hand-held meters for turbidity and chlorine) Hanna Instruments (laboratory and on-line instrumentation) Sutron Inc. (data loggers) Rosemount Products division of Emerson Process Management (on-line turbidity, pH, dissolved oxygen & more) Learn more about turbidimeters at www.AmcoClear.com