Environmental Analysis 15
New Entry-Level Spectrophotometers Narrow the Bandwidth
CIEPF2010 Aims to be a Unique, Domestic Trade Platform for China and an Import & Export Hub for Northeast Asia
2010 China International Environmental Protection Fair (CIEPF2010) the leading specialised environmental protection fair in Northern China will be held on August 27-29, 2010 at Dalian Star-Sea Convention Center in Dalian Liaoning Province China.
CIEPF is the largest Only National Professional Environmental Protection Trade Fair sponsored by Ministry of Environmental Protection P.R. China biyearly in Dalian China since 2000. Past events have attracted overseas exhibitors from America, Germany, Belgium, France, Japan, Korea, Canada, Sweden, Netherlands and another 22 countries.
CIEPF2010 aims to be a unique, domestic trade platform for China and an import & export hub for Northeast Asia. Occupying a total exhibition area of 30,000 square meters, CIEPF2010 will feature nine specialised show areas under one roof: Air Pollution Control; Water Pollution Control Technology, Production and Equipment; Waste Management; Noise and Vibration Control; Comprehensive Utilisation of Resources; New Energy Resources Technology; Environmental Monitoring Instrument and Relevant Equipments; Environmental Sign Products, Green Products, Organic Food and Energy Saving Products; E.P. Financial Service, Socialized Operation of Equipment.
Jenway’s (UK) new 73 series spec- trophotometer range provides entry-level instruments with a narrower spectral bandwidth of 5nm and an improved absorbance range of –0.3 to 2.5A, all within an innovative space-saving design.
The patent pending design of the 73 series cleverly minimises the overall footprint of the instrument by incorporating the large graphical display into the instrument’s lid. The easy-to-read display is ideal for demonstrations and enables live spectrum and kinetics scans to be clearly viewed. The instruments have the additional option of an integral printer, for further space saving – an important benefit in situations, such as teaching laboratories, where bench space is at a premium.
All four models are supplied with free bi-directional PC software. The advanced models, 7310 and 7315, also have the additional feature of an easy access USB port on the front of the instrument which enables results and methods to be saved directly to a USB memory stick.
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Why you Should be Concerned about Perfluorinated Compounds?
Many recent news stories have featured perfluorinated compounds, PFOS and PFOA. What exactly are these compounds and why such concern? Perfluorinated compounds are a group of industrial chemicals that have been used for over 50 years in surface treatments,
surfactants, firefighting foams, and many other applications. They are also a critical ingredient in the manufacturing of popular stain prevention products and non-stick pans. PFCs are very stable and persistent compounds which make them very useful in their intended applications, however, these characteristics also make them bio-accumulative should they migrate into the environment.
Recent studies have revealed the presence of these compounds in the blood of arctic polar bears, as well as in the blood of humans in many industrial nations. Additional studies in animals have demonstrated carcinogenic effects. With their wide spread distribution in the environment and an indication of their effect human health effect, there is greater concern over these particular compounds. PFOS (a sulphonated perfluorinated compound) and PFOA (a carboxylated perfluorinated compound) have been highlighted as the compounds having the largest environmental impact.
Analysing and quantifying these compounds is difficult because of their nearly ubiquitous nature in the laboratory. High background levels have hampered sensitivity and prevented the desired detection limits from being reached. Scientists at Waters Corporation have developed a unique solution to this problem. Using a special instrument configuration with the ACQUITY UPLC®
system, the
background interference can be removed from the analysed sample, leading to much lower detection limits than previously demonstrated. Methods have been developed for water and blood samples that capable of detecting PFOA down to 0.5 ppt and PFOS down to 0.4 ppt, both in less than 10 minutes.
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World’s Smallest Digital Humidity Sensor
With the new SHT21, Sensirion (Switzerland) launches the world’s smallest digital humidity and temperature sensor. The SHT21 consists of a newly designed, sophisticated sensor chip encapsulated in a 3x3x1.1-mm DFN 3-0 package. Over-molding provides excellent protection against aging and ambient impact, such as condensation and harsh environments, and thus yields outstanding long-term stability.
The SHT21 is fully calibrated and provides an I2C digital interface. Analog output modes (such as PWM) are available on request. The digital communication mode enables superb low power consumption: A
value in the range of 3µW at normal operation is well achieved. Typical sensor accuracy is ±2% RH over 20–80% RH and ±0.3°C over 25–42°C. Provided on tape & reel, the reflow solderable SHT21 is suitable for high volume applications. Furthermore, the sensor is qualified in accordance with automotive standard AEC-Q100 and an extended quality assurance program guarantees low PPM values.
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Available in an easy to use PFC Analysis Kit, this analytical solution provides a robust solution to this challenging problem. To learn more, please visit us at
www.waters.com/environment
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Watch our Environmental Analysis Solutions video:
www.waters.com/enviro
Fast, sensitive solutions for air, water & soil analysis
Waters Corporation is working to make the environment safer and industries greener. Providing efficient, cost-effective, and compliant solutions for scientists in academia, industry, government, and private testing laboratories, Waters is your source for environmental testing solutions.
©2010 Waters Corporation. Waters, Oasis, and The Science of What’s Possible are trademarks of Waters Corporation.
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May/June 2010
IET
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