ENVIRONMENTAL LABORATORY 25
errors and warnings. However, the information provided either does not allow any further conclusions to be drawn about the validity of the transmitted result, or signals error messages only as collective alarm.
Somewhat more effi cient is the connection of analyzers via fi eldbus systems. This enables both measured values and metadata to be read out in plain text. In addition, error messages can be specifi cally assigned so that the service personnel can prepare for the action accordingly.
Modern systems, such as the TOC-4200, can be connected to the company network allowing relevant information to be viewed via the web browser. With the appropriate IT infrastructure, this can also be done on the offi ce PC, smartphone or even from the home offi ce.
Next generation maintenance
In order to facilitate predictive preventative maintenance, more than just measurement results and alarms are required. Trained staff can identify problems before they arise, especially on site. Technicians analyze the sum of information provided by the direct assessment of a device and inspect, assess, initiate appropriate measures based on their trained expertise and experience.
To enable such diagnoses and interventions remotely, analyzers need to output additional information – nowadays often referred to as “vital data”. It is recorded internally by the instruments and may trigger an alarm when pre-programmed thresholds are reached, which then signals disturbed measurement operation and declares the measurement result as invalid by alarm output. The trick is to extract this data in a way that identifi es long-term trends indicative of a possible problem occurring in the near future.
Towards smart water analysis
The availability of continuous diagnostic data, such as baseline signal, pressures, temperatures or mechanical parameters, is the foundation for a next generation digitalization of maintenance and diagnostics in process analytics. The requirement itself is
Figure 1: TOC-4200 from Shimadzu.
not new at all – but what did not existed until now was a manufacturer-independent interface. Only with standardization will the implementation effort of this type of data connection be reduced to such an extent that the transmission of large amount of diagnostic data is worthwhile in the fi rst place.
To make this possible, towards the end of the last decade, the main users from the industry and equipment manufacturers agreed on such independent protocols, the “language of online TOC analyzers”, based on common and modern transmission standard. The next step was the start of the projects in which the new data interfaces are tested in practical experiments and running large-scale plants.
After all, data is worth nothing if it is not possible to draw appropriate conclusions from it. Together with maintenance personnel, technicians and developers, gigabytes of data are being analyzed. They must be brought into relation with real incidents and peripheral process data in order to create data models on the basis of which diagnoses, and interventions are only possible in a meaningful way.
As soon as this is completed, it will become clear whether the dream of the intelligent process analyzer for smart water analysis, which for the most part can be serviced and parameterized remotely requiring only scheduled on-site maintenance, will become reality. In any case, the prospects for this are quite promising.
Biographies Markus Janssen
Markus Janssen is Product Manager for laboratory and online TOC systems. Started as an automation engineer in the chemical industry, where PAT quickly became his main area of expertise, he has since dedicated his expertise to “everything Total Organic Carbon” at Shimadzu, one of the leading manufacturers of TOC analyzers.
Author Contact Details Markus Janssen, Shimadzu Europa GmbH • 47269 Duisburg, Germany • Tel: +49 203 76870 • Email:
shimadzu@shimadzu.eu • Web:
www.shimadzu.eu
High quality reference standards for simple and cost-effective PFAS analysis
Per- and Polyfl uorinated Substances (PFAS) analysis is becoming more important than ever as these persistent environmental contaminants are being identifi ed in surface water as well as in animal and human populations across the globe.
To address this world-wide pollutant, many different regulatory agencies around the world have released methods for the analysis of these compounds. Currently there are promulgated methods from the USEPA, ASTM, and ISO for the qualitative and quantitative analysis of these compounds in different matrices. The one thing all of these methods have in common is the requirement for high quality reference standards for calibration.
There are hundreds of PFAS compounds currently listed as being found environmentally, and many more will be discovered. AccuStandard’s PFC-24 - Perfl uorinated Native Compound Standard product contains 24 of the most commonly analysed PFAS at 2 µg/mL in a methanol/water matrix. This product can be used for many different methods and allows for easy and economical calibration.
AccuStandard offer many other single and multi-component solutions available to aid the analytical chemists in meeting the requirements for these methods. They are always working to keep their product line current so that chemists can continue the important work of identifying the reach of these compounds
AccuStandard has 35 years of experience formulating chemical reference standards to aid the analytical community. They are accredited to ISO 17034:2016, and 17025:2017 as well as certifi ed to ISO 9001:2015.
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Reliably resolve benzene and toluene with new column set
Restek’s new D3606 column set achieves accurate quantifi cation of toluene and benzene—including benzene in gasoline containing ethanol or butanol blends—with no compromising coelutions. An updated formulation with improved support material and polymers enhances robustness and reproducibility.
Listed in the ASTM Method D3606, Restek’s new D3606 column set helps labs attain better separation of benzene and ethanol while following ASTM method requirements. Restek’s two-column sets (cat.# 83606A) are individually tested for D3606 method applicability and include a QC test chromatogram with approximate backfl ush times.
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Our Guide Issue is coming up. Make sure you’re in and listed! Don’t miss out, visit:
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WWW.ENVIROTECH-ONLINE.COM IET SEPTEMBER/OCTOBER 2021
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