Automated mobile field laboratory for on-the-go soilnutrient analysis with the ISFET multi-sensor module

Tsukor, V.; Hinck, Stefan; Ruckelshausen, Arno; Nietfeld, W.; Mosler, T.; Tesch, H.; Lorenz, F. W.; Najdenko, E.; Moeller, Andreas; Mentrup, D.

doi:10.51202/9783181023617-377

Cited by 5 publications

(6 citation statements)

References 2 publications

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“…Hinck et al [42,43] describe the changes in the "traditional soil sampling with analysis in the laboratory" process and the new soil2data process with soil sample collection and subsequent analysis in the field. Furthermore, Riedel et al [38] describe the integration of ISFET technology into the analysis process, with the necessary preparation of the sample material to produce an aqueous extraction for the analysis of plant-available nutrients in the field in a mobile field laboratory. In a similar vein, Nadjenko et al [44] argue for the necessity of an expedient soil preparation method for nutrient analysis in the field, with the aim of achieving a high correlation with the generally accepted standard preparation method.…”

Section: Soil Applicationmentioning

confidence: 99%

Concept and Realisation of ISFET-Based Measurement Modules for Infield Soil Nutrient Analysis and Hydroponic Systems

Riedel,

Hinck,

Peiter

et al. 2024

Electronics

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Ion-selective field-effect transistors (ISFETs) offer potential as micro-sensors for in situ monitoring of complex target variables in real-time closed loop actions. This article presents the concept and realisation of application-specific ISFET-based measurement systems for two different agricultural domains: infield soil measurements and hydroponic systems. Commercially available ISFETs were integrated as multi-sensor modules as well as single-sensor units for the measurement of plant-available nutrients, such as H2PO4−, NO3−, K+ or NH4+, and pH-values. Moreover, application-relevant pH values as well as temperatures for calibration purposes were measured. ISFETs were selected according to the relevant measurement dynamics for the applications. For the development and testing procedures, a laboratory setup was built up. Supported by reference materials, the outputs of the ISFETs were evaluated with respect to stability under the influence of disturbance variables, reproducibility and settling time. The results were used to develop new readout electronics. Next to stability, conditioning and calibration processes were relevant. The micro-sensors were integrated in new application-specific mechatronic handling systems and process flows. The realisation and tests are presented as well as first measurements in outdoor fields and indoor hydroponic environments.

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Section: Soil Applicationmentioning

confidence: 99%

Concept and Realisation of ISFET-Based Measurement Modules for Infield Soil Nutrient Analysis and Hydroponic Systems

Riedel,

Hinck,

Peiter

et al. 2024

Electronics

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“…ISFETs provide the advantages of fast response, high sensitivity, low output impedance, low sample consumption, easy mass production and low cost. Therefore, ISFET has been widely used in clinical medicine [40,41], food [41,42], environmental science [43][44][45], military science, and even robot technology [46,47]. In recent years, it has displayed great potential in many fields, especially in biochemical sensors.…”

Section: Ise Sensorsmentioning

confidence: 99%

Wearable and printable devices for electrolytes sensing

Wang

et al. 2023

Nano Futures

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With the development of biotechnology and the miniaturization of sensors, wearable devices have attracted extensive attention for real-time and non-invasive health monitoring at the molecular level. Among these, sensors for electrolytes analysis play an essential role in monitoring body physiological functions and metabolic activities. Herein, this review firstly summarizes the recent advances in electrolytes sensing via wearable devices, focusing on the most commonly adopted ion-selective electrodes, optical sensors and sensing platforms for effective body fluid collection and analysis. Innovative strategies based on nanomaterials engineering to achieve biosensing reliability, mechanical robustness as well as biocompatibility are also presented. Moreover, novel printable fabrication approaches to realize integrated wearable sensing systems with desirable compatibility and versatility are introduced. Finally, the challenges for practical applications and the perspectives on accurate and multi-functional sensing based on integrated wearable devices are discussed.

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“…200 g) to be obtained with a hydraulic soil sampler is necessary for the soil-to-solution ratio. At the same time, the soil-to-solution ratio must be large enough to extract a sufficient amount of nutrients within the measuring range of the ISFET multisensor (Tsukor et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Here, the accuracy of the preparation procedure for wet‐chemical analysis is of great importance, as is the importance of achieving sufficient nutrient concentration in the extract according to the measurement capability of the NUTRI‐STAT analysis module that simultaneously measures the ions NO 3 − , K + , and H 2 PO 4 − and pH value in the same extract. The measurement range of pH value and plant‐available nutrients goes far beyond the typical range of agricultural soils (Tsukor et al., 2019). The results of the on‐site analysis will be sent to a cloud server via the internet.…”

Section: Introductionmentioning

confidence: 99%

“…200 g) to be obtained with a hydraulic soil sampler is necessary for the soil‐to‐solution ratio. At the same time, the soil‐to‐solution ratio must be large enough to extract a sufficient amount of nutrients within the measuring range of the ISFET multisensor (Tsukor et al., 2019). Furthermore, the soil extract must have a pH below 4.5 (Lehmann, 2021), because H 2 PO 4 − is fully detectable in an acidic milieu (Lindsay, 1979), which is the required ion for the NUTRI‐STAT multisensor.…”

Section: Introductionmentioning

confidence: 99%

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Development of an express method for measuring soil nitrate, phosphate, potassium, and pH for future in‐field application

Najdenko,

Lorenz,

Olfs

et al. 2023

J. Plant Nutr. Soil Sci.

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BackgroundIn practical farming, there is often a need for short‐term availability of information on the soil nutrient status.AimsTo develop a new express method for the extraction of major plant‐available nutrients and measurement of soil nutrients. In future, this method shall serve for in‐field measurements of soil samples with an ion‐sensitive field‐effect transistor (ISFET).MethodsVarious extraction conditions such as type of extractant, soil‐to‐solution ratio, time, and intensity were investigated on a broad selection of dried soil samples in the laboratory. Based on 83 field‐moist soil samples with varying clay contents, these conditions were compared to standard laboratory methods.ResultsWith increasing extraction time, the nutrient concentrations increased. When the soil‐to‐solution ratio was reduced, a greater share of nutrients was extracted, independent of soil type. H2O and 0.01 M CaCl2 and standard calcium‐acetate‐lactate (CAL) solution proved to be too weak in the short period to reach the ISFET sensor measurement range. Higher concentrated CAL solutions performed much better. Finally, a 5‐min CaCl2 extraction followed by the removal of an aliquot for the determination of soil pH and NO3− was found to be effective. The remaining solution was then mixed with 0.20 M CAL solution for the analysis of H2PO4− and K+ at 10 min of extra extraction time. This extraction method showed very good correlations with the values based on the German laboratory reference methods for pH (R2 = 0.91) and for nitrate (R2 = 0.95). For phosphorus and potassium, we obtained an R2 of 0.70 and 0.81, respectively, for all soils. When soils were grouped according to clay content higher correlations were found.ConclusionsA new express method based on a wet‐chemical approach with a soil preparation procedure was successfully developed and validated. This seems to be a valuable basis for future in‐field measurements via ISFET.

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Automated mobile field laboratory for on-the-go soilnutrient analysis with the ISFET multi-sensor module

Cited by 5 publications

References 2 publications

Concept and Realisation of ISFET-Based Measurement Modules for Infield Soil Nutrient Analysis and Hydroponic Systems

Concept and Realisation of ISFET-Based Measurement Modules for Infield Soil Nutrient Analysis and Hydroponic Systems

Wearable and printable devices for electrolytes sensing

Development of an express method for measuring soil nitrate, phosphate, potassium, and pH for future in‐field application

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