Environmental Analysis & Electrochemistry
Modernising Trace Organic Analysis in Environmental Sample Extraction
A book discussing the importance of sample preparation for trace organic analysis is available as a download from Analytix. Environmental samples must still undergo some type of pretreatment because the sample matrices often are not compatible with modern instrumentation however this stage can contribute up to 50% of the errors in performing the analysis. The problems in sample preparation reported by laboratories include processing times, costs, poor recoveries, reproducibility, and contamination.
The book focuses on helping today’s laboratories understand and overcome the difficulties of sample preparation by learning how to THINK GREEN. Part One focuses on the fundamental theory of extracting an analyte from a sample matrix, a comparison of modern extraction techniques, and post extraction processing methods available. The second part reviews modern instrumental analysis techniques including LC, GC, LCMS, and GCMS and how they relate to the sample preparation process. The final part discusses how advances in microwave technology bring sample preparation to the same standards as instrumental techniques. It compares different extraction techniques and also looks at compliance. A wide number of different application areas are also reviewed.
More information online:
www.analytix.co.uk/contact/ 51761pr@reply-direct.com
Versatile pH Meter and Conductivity Meter Announced
Trans Instruments, a specialist manufacturer of pH and conductivity instrumentation for over 30 years, announces the WalkLAB HP9010 pH meter and HC9021 Conductivity meter. Designed with accuracies matching that of benchtop meters, yet fully portable for onsite use, these meters have a large and simple to navigate backlit LCD display in a rugged ABS casing, which is fully splash and weather proof and has an IP rating of 65. It is simple to use with each measurement automated with an auto-lock system that will display a stabilised endpoint reading. This unique feature allows users, even inexperienced ones, to make calibration and take measurements with minimum handling, temperature or sensor stability errors. Calibration data are stored in non-volatile memory, where in the event of battery removal, data is not erased. It can to store up to 99 sets of measured data memory for pH, mV and temperature stamped with date and time. Users can download stored memory or make continuous data logging on a PC with the optional USB connection kit that comes with an interface software.
The HP9010 pH meter is capable of 5 point calibrations with automatic buffer recognition. Two groups of standards can be selected from ISO standard pH7.00, 4.01 and 10.01 or NIST standard of 6.86, 9.18 etc. Users are able to review the calibration offset and percentage of slope of the electrode. The meter can be attached with an ORP electrode to make redox measurement in millivolts.
The HC9021 conductivity meter is able to make 5 point calibrations over the full range and measured readings are automatically switched to the calibrated range at each of the calibrated point. This greatly enhances the accuracy of the measurement over the entire range. The meter can display units in ppm and conversion factors are adjustable if required. Salinity measurement can be made by switching the display mode to display in ppt, where a separate calibration can be made in NaCl calibration standards.
Both meters are made where ease of use, repeatability and robustness are fundamentals to educational, industrial, textile, aquaculture, commercial and professional users.
More information online:
ilmt.co/PL/V1E3 51094pr@reply-direct.com
New Method for Acidic Herbicide Analysis of Waters and Soils Announced
Socotec has developed a new method for the acidic herbicide analysis of waters and soils. The organisation’s Environmental Chemistry division have been awarded UKAS ISO 17025 accreditation for their new LC-MS/MS instrument, which analyses a suite of acidic herbicides in groundwater, surface water, landfill leachates and trade effluents.
Offering a faster, more stable method of analysis, the instrument extracts 50 times less sample volume (10ml compared to 500ml) but still achieves the same sub parts per billion reporting limits (µg/L). This provides a quicker and easier way to test, store and transport samples, as well as generating a more robust set of results.
The LC-MS/MS instrument offers a host of additional benefits, including a higher sensitivity and faster instrument runtime, the latter of which ensures that a greater number of samples are analysed in a day. Sample preparation time and the need for regular instrument maintenance has also been reduced, as no derivatisation is required.
“Acidic herbicides require a highly selective and sensitive method of analysis due to their high water solubility, low volatility and heavy agricultural use,” said Becky Batham, Operations Manager, Laboratory and Analytical, Socotec UK. “With this in mind, the new LC-MS/ MS instrument has been developed to more accurately and efficiently measure acidic herbicide presence in waters and soils, as well as to help maintain public and environmental safety.
“Gaining UKAS accreditation for this new testing method is a fantastic achievement for the Environmental Chemistry division, demonstrating their high level of commitment to developing new and innovative solutions for clients.”
More information online:
ilmt.co/PL/pA6P 52550pr@reply-direct.com
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