Environmental Analysis & Electrochemistry
Aluminium Monitoring for Wastewater Treatment
Aluminium salts, such as aluminium sulphate and polyaluminium chloride (PAC), are used as coagulation agent and flocculant for treatment of overloaded wastewater. For efficient wastewater treatment, the knowledge of the exact amount of aluminium, expressed as aluminium oxide (Al2O3) in the flocculant, is essential. This can be achieved rapidly and reliably by thermometric titration of the aluminium with sodium fluoride according to the newly revised standard ABNT NBR 11176. To learn more about this analysis, download the Application Note AN-T-224 from Metrohm.
Aluminium has a toxic effect on fish in acidic water and must therefore be removed before the release of the treated water into the environment. The European Union stipulates the monitoring of aluminium as an indicator parameter with a maximum content of 200 µg/L. Adsorptive stripping voltammetry (AdSV) allows the measurement of concentrations as low as 5 µg/L. Compared to atomic absorption spectroscopy (AAS) or Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), voltammetry is a viable alternative with only moderate investment in hardware required and low running costs. Download the Application Bulletin AB-131 from Metrohm to learn more.
More information online:
ilmt.co/PL/0Den and
ilmt.co/PL/1DEE 56997pr@reply-direct.com
Detect Mercury, Arsenic, and Selenium in Environmental and Food Samples
P S Analytical (PSA) provides niche analytical instruments for the determination of mercury, arsenic, selenium, antimony and bismuth in many sample matrices including environmental and food and beverage samples.
The presence of these toxic metals in their various forms is of real concern. Increasingly the determination of both total and speciated chemical forms is required and this requirement generates further analytical challenges of sensitivity, selectivity and freedom for interferences.
In addition to analytical considerations operation issues such as; ease of use, reliability and robustness as well as very affordable running costs are all important and are recognised hallmarks or the PSA brand.
Coupling Atomic Fluorescence Spectroscopy (AFS) with either cold vapour generation or hydride generation has been PSA’s core competency for over 30 years. With the addition of analyte separation capability which allows for speciation studies, PSA offers some powerful tools to help with these endeavours.
For example, the separation of; methyl mercury from inorganic mercury in water, shellfish, seaweed, dairy products, vegetables and grains; the determination inorganic arsenic from less toxic organo arsenic species in water, rice, seaweed are examples of routine applications developed for this growing area of concern.
The team is constantly developing new methods and applications to address market concerns and so if you have a sample you are interested to know more about with, PSA would love to hear from you.
With literally thousands of systems in the field today, and support networks in Europe, USA and SE Asia, PSA offers the ideal package of performance, reliability and support. More information online:
ilmt.co/PL/wJXR
55329pr@reply-direct.com
Expanded SARS-CoV-2 Wastewater Surveillance Test Kit
IDEXX has expanded the SARS-CoV-2 wastewater surveillance test kit range by incorporating a Matrix and Faecal Control Kit, which provides a validated matrix recovery control and human faecal measurement for normalisation in a single, multiplexed reaction. The EU Commission recommends both of these controls for providing actionable SARS-CoV-2 wastewater surveillance data to public health officials.
IDEXX has worked with laboratories around the globe to accelerate the implementation of wastewater surveillance. The SARS-CoV-2 RT-PCR Test offers standardised methodology, consistent results, and is supported by comprehensive IDEXX quality-control procedures and supply chain expertise. In 2021, a Water Research Foundation (WRF) study showed the IDEXX test outperformed most methods on consistency of detection.
IDEXX introduced the Water SARS-CoV-2 RT-PCR Test in July 2020 to support wastewater surveillance to track the prevalence of COVID-19 in communities. The Water SARS-CoV-2 RT-PCR Test combines the company’s long history of developing PCR tests and over 20 years providing validated wastewater tests. The test gives consistent results that have been validated on real-world and geographically diverse samples.
More information online:
ilmt.co/PL/nLQv 57619pr@reply-direct.com
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