Development of an in-situ total phosphorus analyzer

Taylor, E.S.; Bonner, James S.; Nelson, Russell; Fuller, Christopher C.; Kirkey, William D.; Cappelli, Stephanie

doi:10.23919/oceans.2015.7404384

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…32 Impressively, an in situ total phosphorus analyzer with component cost less than $3,000 was developed in 2015. 36 However, they still require consumable filters, precise but costly pumps and valves, and delicate fluid channels that need to be rinsed after every measurement. These devices often have problems of reagent storage and inherent difficulties in completely cleaning the fluidic paths.…”

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confidence: 99%

“…To make the sensor more affordable and practical, some reported in situ devices employing low-cost microfluidic components and detectors to reduce the cost and size. − Impressively, an in situ total phosphorus analyzer with component cost less than $3,000 was developed in 2015 . However, they still require consumable filters, precise but costly pumps and valves, and delicate fluid channels that need to be rinsed after every measurement.…”

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confidence: 99%

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Low-Cost Automatic Sensor for in Situ Colorimetric Detection of Phosphate and Nitrite in Agricultural Water

Lin

et al. 2018

ACS Sens.

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This study proposed a low-cost sensor for in situ automatic monitoring of phosphate and nitrite in agricultural water environments, involving a series of “Fish-Bite” reservoirs, multiple reagent capsules, and a colorimetric sensor. The Fish-Bite reservoir is an alternative to the pumps, valves, and filters that are widely used for water sample collection and also offers a closed cell for chromogenic reactions afterward. Up to two capsules can be embedded in each reservoir to support chromogenic reactions that use two different reagents in sequence. From the results of calibration tests in the laboratory, the limit of detection was found to be approximately 0.01 mg/L for both phosphate and nitrite, with a linear range of 0.01–1.00 mg/L for phosphate and 0.01–0.20 mg/L for nitrite. Furthermore, an in situ experiment was successfully carried out in an irrigation canal beside farmland to demonstrate the practicability and robustness of the device. The averaged concentrations of phosphate and nitrite were 0.0113 mg/L and 0.0383 mg/L, respectively. The relative deviations were 20.2% and 11.7%, respectively, referred to results obtained by using the standard spectrophotometric methods. With the advantages of being robust, fast, and low cost, this in situ device is promising for the formation of agricultural sensor networks.

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confidence: 99%

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confidence: 99%

Low-Cost Automatic Sensor for in Situ Colorimetric Detection of Phosphate and Nitrite in Agricultural Water

Lin

et al. 2018

ACS Sens.

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“…Similar results are observed by Bai et al (2014). Taylor et al (2015) developed an insitu analyser for orthophosphate and total phosphorus. The analyser used the chloridemolybdenum blue method following oxidative digestion with acidic peroxodisulfate.…”

Section: Nutrientssupporting

confidence: 82%

Study and Design of a Sensor System for the Detection of Illicit Discharges in Sewers and Water Bodies

Morant¹

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The use of water in our society is of great importance. This is used not only for human consumption but also for industrial and livestock activities. Once the water has been used and is no longer helpful for the activity, it becomes a waste called residual water. These waters contain substances that endanger human health and ecosystems. To reduce environmental damage, there are treatment plants that treat these waters to reduce their levels of contamination. We can find two types of sewage treatment plants, those that purify water from urban centres and industrial sewage treatment plants. Industrial treatment plants are responsible for reducing the contaminant load of the water so that it can be discharged into the public sewer system or into the environment.The presence of illegal discharges and overflows in the sewage system pose a threat to water bodies. Illegal discharges occur when a company or person discharges a volume of water into the sewer without authorization. These discharges can cause a drop in the performance of the treatment plant, which will cause an effluent of poorer quality. On the other hand, overflows are generated when the sewer cannot carry all the water that enters and it is necessary to use the sewer overflows. Overflows can cause pollution of water bodies. In many cases, it is not possible to detect who is responsible for the spills. What makes these go unpunished violating the environmental principle of that whoever pollutes pays.To solve this problem, the development of a low-cost system for monitoring water parameters to detect problems in sewers within the context of smart cities is proposed. Our working hypothesis is that in the presence of a discharge, the concentration of specific water parameters will change enough to be detected. When the site of the spill is detected, it will be possible to quickly go to the place in order to stop the spill in addition to taking the necessary legal actions against the person who is carrying out the spill.For our system, we have compiled information on the different parameters that are incorporated into other systems to monitor sewage, such as water level, temperature, conductivity, turbidity and other water contaminants such as organic matter, nutrients, pH and heavy metals. With this information, we have determined that the most exciting parameters that we are able to measure at a low cost are temperature, conductivity, turbidity, water and oil level. In addition, the use of rain sensors for storm sewers is included.To monitor these parameters, low-cost commercial sensors are chosen to monitor temperature, level and rainfall. For the other parameters, the low cost commercial options that currently exist are not helpful. That is why we decided to develop our own sensors. We decided to use inductive type sensors for conductivity and optical sensors for turbidity and oil control.Regarding the inductive sensors, we have determined that there are interferences of the solids and the water level in the response of the sensor. We have verified that t...

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“…Today it is common to use small measurement systems based on microcontrollers, created for a specific task, with portability and flexibility features. These low-cost, special-purpose systems are being created and used in a wide variety of research and application fields, such as Acoustics and Electroacoustics measurements [3]- [9], Electrochemical biosensors [10]- [11], Electrochemical impedance spectroscopy [12], Electronics [13]- [18], Environmental measurements [19]- [24], Medical [25], Micro-electromechanical [26], Micro-fluidics [27], Optical particle counters [28], low distortion Sine-wave generation [29], Soil moisture measurement [30]- [31] and Yeast concentration measurement for brewery [32].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, a low-cost acoustic noise barriers measurement system based on the Teensy development board is presented [5]- [7], [9], [12], [16], [27], [28] and [31].…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost System for Quick Measurements on Noise Barriers in Situ

Guidorzi

Garai

2022

IEEE Trans. Instrum. Meas.

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This paper describes the development of a low-cost device for measuring the acoustic intrinsic characteristics of noise barriers. The system is based on the Teensy 4.1 microcontroller combined with a few other components. The measurements are carried out using a vertical linear microphone antenna housing 6 microphones and a lightweight loudspeaker, wireless connected to the main unit. Both the main system unit and the amplified loudspeaker are powered from normal 5 V USB battery packs, which are easily rechargeable and interchangeable. The system measures 6 impulse responses using an MLS signal and performs a series of calculations and frequency analyses to characterize the device under test, following a simplified version of the European standards EN 1793-5 and EN 1793-6 (commonly referred to as the 'Adrienne method'). One measurement takes few minutes, obtaining results comparable to those obtained with the Adrienne method, which requires a more complicated and heavy measuring equipment and is much more expensive and time consuming.

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Development of an in-situ total phosphorus analyzer

Cited by 8 publications

References 3 publications

Low-Cost Automatic Sensor for in Situ Colorimetric Detection of Phosphate and Nitrite in Agricultural Water

Low-Cost Automatic Sensor for in Situ Colorimetric Detection of Phosphate and Nitrite in Agricultural Water

Study and Design of a Sensor System for the Detection of Illicit Discharges in Sewers and Water Bodies

A Low-Cost System for Quick Measurements on Noise Barriers in Situ

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