UVC LED - Based nutrient analysers

The MIP (Molecularly Imprinted Polymer) technology, coupled with SPME, offers an advanced solution for simultaneous and selective in-situ detection of nitrite (NO₂⁻) and nitrate (NO₃⁻). This cutting-edge analyser combines rapid ion chromatography (IC) with the energy efficiency of UV-LED detection to deliver laboratory-grade accuracy for water sample measurements.

The device’s detection cell is crafted using stereolithography (SLA) 3D printing, ensuring precision manufacturing. Additionally, the analyser supports instant data communication through SCADA or IoT systems, enabling seamless integration into monitoring networks. It is ISO 14034 accredited, achieving an accuracy of approximately 99% in freshwater and 95% in wastewater and saline water, with an overall precision of 95%. Sampling can occur at intervals as short as every 15 minutes.

The analyser’s nutrient detection range is tailored for various water types. In freshwater, it can detect nitrate concentrations between 0.6 and 500 mg/L as NO₃⁻ and nitrite concentrations from 0.05 to 100 mg/L as NO₂⁻. In fully saline water (35 ppt), the detection range shifts slightly, with nitrate measurable from 1.0 to 500 mg/L as NO₃⁻ and nitrite from 0.5 to 100 mg/L as NO₂⁻.

Field performance remains robust under a wide range of environmental conditions. The device operates efficiently at temperatures between 7°C and 40°C, with sample temperature tolerance from 2°C to 50°C and humidity levels ranging from 10% to 90% RH (non-condensing). Its accuracy is unaffected by variable field conditions, including turbidity and diverse sample matrices such as different salinity levels.

The nutrient analyser plays a critical role in enhancing decision-support systems (DSS). By providing real-time, in-situ monitoring of nitrite and nitrate levels, it enables the assessment of nutrient uptake in agricultural applications. This data informs whether crops are absorbing essential nutrients or if excessive fertilisation is leading to nutrient leaching. Consequently, the analyser supports optimised fertilisation practices, reducing costs and mitigating environmental pollution.