Water/Wastewater 33 Is Bisphenol A In My Water?
Debate continues on the chemical compound Bisphenol A (BPA) regarding its effects on human health and whether it requires regulation. Used in industrial activities, particularily in resins and plastics used in food and beverage packaging materials, BPA has been the subject of numerous studies, many linked to human health concerns. One study estimates there are detectable levels of BPA in more than 90% of the US population.
Reacting to this news, Canada declared Bisphenol A a hazardous substance, the American Medical Association called for more studies, and the European Food Safety Authority began assessing human health risks. Acting on this increased interest, ASTM International recently published Method D7574-09 – “Standard Test Method for Determination of Bisphenol A in Environmental Waters by Liquid Chromatography / Tandem Mass Spectrometry.” This method was developed and validated by the US Environmental Protection Agency using Environmental Solutions from Waters Corporation.
Providing fast, sensitive results, Waters breakthrough ACQUITY UPLC technology offers scientists a new tool in their search for answers about this important compound. Waters provides Environmental Analysis Kits, which include columns, vials, and sample preparation products, that are included in the published method.
As a world leader in separation science, Waters Corporation works with governments, research organizations and industrial partners worldwide to resolve new and emerging environmental concerns. Employing cutting-edge technologies and techniques, Waters has solutions for many of the challenges in the news today, including BPA, PFCs, and Pharmaceuticals and Personal Care Products.
Ultrameter II With all new features and functions …
Whether you are engaged in the testing of air, water or soil, Waters (USA) has solutions for your environmental analysis. To learn more, please visit us at
www.waters.com/environment.
The Ultrameter II still delivers the most accurate dissolved solids measurements of any instrumentation and the greatest degree of accuracy available for pH, ORP and Temperature measurements, but has been redesigned to include an LSI/Hardness Calculator, Free Chlorine Measurements and Bluetooth®
data transfer with the optional bluDock™ accessory. Reader Reply Card no 104
The LSI calculator makes it easy to analyse the scaling nature of water in the lab or in the field. The calculator computes the saturation index of a sample based on measured and inferred values for pH, temperature, hardness and alkalinity. You can then change any of these values in user adjust mode to analyse the effect of the change on water balance. User mode also allows you to input measured values for alkalinity and hardness as determined by other independent testing for a precise saturation index value.
Within the LSI Calculator is a Hardness calculator that allows you to select either ppm or grains of hardness units.
Accurate Open Channel Flow Measurement
FlowCERT and DUET, the most accurate open channel flow measure- ment system you can buy – official!
In open channel flow measurement nobody can touch Pulsar Process Measurement (UK) their FlowCERT non-contacting ultrasonic system featuring the DUET transducer array has been certified as having the lowest error of any equipment tested to the new MCERTs Class 1 standard, including measurement under solar radiation and heat tests.
Pulsar’s FlowCERT is streets ahead of the competition, with a total accuracy ‘combined performance characteristic’ that is five times more accurate than it needs to be to achieve the Class 1 standard. Accuracy figures are published for all equipment that has been tested to the MCERTs standards on the SIRA website, so it is easy for anyone to see comparison figures.
Pulsar’s DUET transducer array is unique in that it is completely immune to temperature variations in the column of air, which affect the speed of sound, introducing inaccuracy to the measurement. DUET consists of two transducers working together: mounted a set distance apart and firing at the same time, the returning echo received at the lower transducer only. The distance between the transducers is known and fixed; the software built into FlowCERT automatically compensates for any variations in temperature.
Reader Reply Card no 106 Reader Reply Card no 107
Free chlorine measurements are mathematically derived from Oxidation Reduction Potential measurements. The mV to ppm free chlorine conversion algorithm is based on a published
conversion curve and bench testing performed at the Myron L Company. With this new feature Myron L instruments can measure a dynamic range of sanitizer concentrations that is wider than the range of a colorimetric test kit.
With the bluDock™ accessory package, the Ultrameter II can now also transfer data wirelessly using Bluetooth® technology.
The Ultrameter II also features KCl, NaCl, 442™ and User-defined solution modes for proper solution modelling in diverse applications. Autoranging allows instrument to maintain resolution for solutions with widely varying concentrations. The pH/ORP sensor is user replaceable and can be calibrated to 1, 2 or 3 points depending on requirements. 4-wire conductivity cell construction, extremely stable circuitry and proprietary conversion algorithms deliver reliable repeatable results.
Ultrameter II is compact, portable, waterproof and buoyant, easy to calibrate and easy to use. Call the Myron L Company today to see why customers are saying this is the instrument they've been waiting for.
Reader Reply Card no 105
Ultrameter II™
6Psi bluDock Enabled TM
NEW! bluDock™ Wireless Data Transfer (optional)
www.myronl.com
NEW! LSI and Hardness Calculator
Annual Buyers Guide 2010
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