Portable device for on-site detection of ammonia nitrogen

Xu, Xianbao; Bai, Zhuangzhuang; Wang, Tan

doi:10.1016/j.inpa.2022.07.003

Cited by 5 publications

(6 citation statements)

References 31 publications

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“…Up to now, a series of characterization methods have been used for quantitative characterizations for NH 3 yield, such as the colorimetric method (indophenol blue method, [9,19,84] the phenate method, [85] and Nessler's reagent method [86] ), 1 H nuclear magnetic resonance (NMR), [9] ammonia-ion selective electrode (ASE) method, [15] and ion chromatography (IC), [15] and so on.…”

Section: Quantitative Characterization Of Nhmentioning

confidence: 99%

“…[87] Furthermore, the selection of appropriate NH 3 quantification methods is related to the pH of the electrolyte. [86][87][88] For example, the indophenol blue method can accurately quantify the amount of NH 3 produced under all pH ranges. [87] Nessler's reagent method is suitable for neutral and alkaline electrolytes.…”

Section: Quantitative Characterization Of Nhmentioning

confidence: 99%

“…To ensure the accuracy of test results, it is necessary to conduct repetitive testing and cross‐testing using the above multiple methods for the detection of low‐concentration NH 3 (especially concentrations lower than 0.2 mg L −1 ) [87] . Furthermore, the selection of appropriate NH 3 quantification methods is related to the pH of the electrolyte [86–88] . For example, the indophenol blue method can accurately quantify the amount of NH 3 produced under all pH ranges [87] .…”

Section: Characterization Of Nrrmentioning

confidence: 99%

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Recent Developments of Dual Single‐Atom Catalysts for Nitrogen Reduction Reaction

Liang,

Shao,

Lee

2023

Chemistry A European J

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Ammonia is vital for fertilizer production, hydrogen storage, and alternative fuels. The conventional Haber‐Bosch process for ammonia production is energy‐intensive and environmentally harmful. Designing environmentally friendly and low‐energy consumption strategies for electrocatalytic N2 reduction reaction (ENRR) in mild conditions is meaningful. Single‐atom catalysts (SACs) have been studied extensively for NRR due to their high atomic utilization and unique electronic structure but are limited by their poor faradic efficiency and low ammonia formation yield. Dual single‐atom catalysts (DSACs) have recently emerged as a promising solution for the effective activation of molecular N2, providing diverse active sites and synergistic interactions between adjacent atoms. In this review, we summarize the latest advances in metal DSACs for electrochemical ENRR based on both theoretical calculations and experimental studies, including aspects such as their variety, coordination, support, N2 adsorption and activity mechanisms, the characterization of NRR and electrochemical cell Configuration. We also address challenges and prospects in this rapidly evolving field, providing a comprehensive overview of DSACs for ENRR.

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Section: Quantitative Characterization Of Nhmentioning

confidence: 99%

Section: Quantitative Characterization Of Nhmentioning

confidence: 99%

Section: Characterization Of Nrrmentioning

confidence: 99%

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Recent Developments of Dual Single‐Atom Catalysts for Nitrogen Reduction Reaction

Liang,

Shao,

Lee

2023

Chemistry A European J

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“…Various ammonia detection methods exist, including calorimetry [ 11 , 12 , 13 ], electrochemistry [ 14 , 15 , 16 ], ion-selective electrodes [ 17 , 18 , 19 , 20 ], gas-sensitive tubes [ 21 , 22 , 23 ], spectroscopy [ 24 , 25 , 26 ], and sampling with laboratory analysis [ 27 , 28 , 29 ]. Among them, artificial olfaction systems, or electronic noses, have emerged as a mainstream technology in recent years, particularly for ammonia detection in breeding farms.…”

Section: Introductionmentioning

confidence: 99%

Structure Optimization and Data Processing Method of Electronic Nose Bionic Chamber for Detecting Ammonia Emissions from Livestock Excrement Fermentation

Shi,

Niu

et al. 2024

Sensors

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In areas where livestock are bred, there is a demand for accurate, real-time, and stable monitoring of ammonia concentration in the breeding environment. However, existing electronic nose systems have slow response times and limited detection accuracy. In this study, we introduce a novel solution: the bionic chamber construction of the electronic nose is optimized, and the sensor response data in the chamber are analyzed using an intelligent algorithm. We analyze the structure of the biomimetic chamber and the surface airflow of the sensor array to determine the sensing units of the system. The system employs an electronic nose to detect ammonia and ethanol gases in a circulating airflow within a closed box. The captured signals are processed, followed by the application of classification and regression models for data prediction. Our results suggest that the system, leveraging the biomimetic chamber, offers rapid gas detection response times. A high classification prediction accuracy, with a determination coefficient R2 value of 0.99 for single-output regression and over 0.98 for multi-output regression predictions, is achieved by incorporating a backpropagation (BP) neural network algorithm. These outcomes demonstrate the effectiveness of the electronic nose, based on an optimized bionic chamber combined with a BP neural network algorithm, in accurately detecting ammonia emitted during livestock excreta fermentation, satisfying the ammonia detection requirements of breeding farms.

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“…The authors reported that the average time for ammonia detection using spectrophotometry is 10 min, but in the case of complex sample preparation, it can take up to 30 min [68].…”

mentioning

confidence: 99%

E-Nose-Driven Advancements in Ammonia Gas Detection: A Comprehensive Review from Traditional to Cutting-Edge Systems in Indoor to Outdoor Agriculture

Moshayedi

Khan

et al. 2023

Sustainability

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Ammonia (NH3) represents a perilous gas that poses a substantial hazard to both human well-being and the environment, particularly within agricultural regions. Agricultural activities constitute a primary source of ammonia emissions. Thus, effective monitoring and measurement of ammonia sources in agriculture are imperative for mitigating its adverse impact. However, not all existing ammonia detection methods are suitable for discerning the low concentrations typically encountered in agricultural ammonia volatilizing (ranging from 0.01 to 5 parts per million). Consequently, curtailing ammonia volatilization from farmland assumes paramount importance, with real-time monitoring serving as a crucial mechanism for assessing environmental contamination and minimizing agricultural ammonia losses. Deploying appropriate detection methodologies ensures that requisite measures are taken to safeguard human health and the environment from the deleterious repercussions of ammonia exposure. The present paper introduces a comprehensive approach to detecting and analyzing ammonia in agricultural settings. It elucidates the merits and demerits of conventional indoor and outdoor ammonia detection methods, juxtaposing them with the innovative technology of Electronic nose (E-nose). Within the paper, seven widely employed ammonia detection methods in farmland are scrutinized and compared against traditional techniques. Additionally, the constructional aspects and distinct components of E-nose are meticulously delineated and appraised. Ultimately, the paper culminates in a comprehensive comparative analysis encompassing all the aforementioned methodologies, elucidating the potential and limitations of E-nose in facilitating ammonia detection endeavors within agricultural contexts.

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Portable device for on-site detection of ammonia nitrogen

Cited by 5 publications

References 31 publications

Recent Developments of Dual Single‐Atom Catalysts for Nitrogen Reduction Reaction

Recent Developments of Dual Single‐Atom Catalysts for Nitrogen Reduction Reaction

Structure Optimization and Data Processing Method of Electronic Nose Bionic Chamber for Detecting Ammonia Emissions from Livestock Excrement Fermentation

E-Nose-Driven Advancements in Ammonia Gas Detection: A Comprehensive Review from Traditional to Cutting-Edge Systems in Indoor to Outdoor Agriculture

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