In-Situ Chemiresistor Sensor Package for Real-Time Detection of Volatile Organic Compounds in Soil and Groundwater

Ho, Clifford K.; Hughes, R. C.

doi:10.3390/s20100023

Cited by 94 publications

(53 citation statements)

References 15 publications

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“…The design of the SAW sensor housing was modeled after the chemiresistor assembly developed by Ho and Hughes [2]. The primary difference between the chemiresistor housing and the SAW housing is that the outer collar for the SAW sensor is longer to accommodate additional electronics on a circuit board.…”

Section: Packaging For In-situ Operationmentioning

confidence: 99%

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Development of a Surface Acoustic Wave Sensor for In-Situ Monitoring of Volatile Organic Compounds

Lindgren

Rawlinson

et al. 2003

Sensors

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This paper describes the development of a surface-acoustic-wave (SAW) sensor that is designed to be operated continuously and in situ to detect volatile organic compounds. A ruggedized stainless-steel package that encases the SAW device and integrated circuit board allows the sensor to be deployed in a variety of media including air, soil, and even water. Polymers were optimized and chosen based on their response to chlorinated aliphatic hydrocarbons (e.g., trichloroethylene), which are common groundwater contaminants. Initial testing indicates that a running-average data-logging algorithm can reduce the noise and increase the sensitivity of the in-situ sensor.

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Section: Packaging For In-situ Operationmentioning

confidence: 99%

“…In addition, their system can only be used for gas-phase sampling. This work integrates an array of SAW sensors with a unique packaging design [2] to allow the SAW sensor to operative passively (no carrier gas) in a variety of media (air, soil, or water).…”

Section: Introductionmentioning

confidence: 99%

Development of a Surface Acoustic Wave Sensor for In-Situ Monitoring of Volatile Organic Compounds

Lindgren

Rawlinson

et al. 2003

Sensors

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“…A robust package has been designed and fabricated to house the chemiresistor array (Ho and Hughes, 2002). This cylindrical package is small (~ 3 cm diameter) and is constructed of rugged, chemically-resistant material.…”

Section: Chemiresistor Arraymentioning

confidence: 99%

Sensors for environmental monitoring and long-term environmental stewardship.

Miller¹,

Robinson²,

Ho³

et al. 2004

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This report surveys the needs associated with environmental monitoring and long-term environmental stewardship. Emerging sensor technologies are reviewed to identify compatible technologies for various environmental monitoring applications. The contaminants that are considered in this report are grouped into the following categories: (1) metals, (2) radioisotopes, (3) volatile organic compounds, and (4) biological contaminants. Regulatory drivers are evaluated for different applications (e.g., drinking water, storm water, pretreatment, and air emissions), and sensor requirements are derived from these regulatory metrics. Sensor capabilities are then summarized according to contaminant type, and the applicability of the different sensors to various environmental monitoring applications is discussed.

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“…Chemiresistors have been shown to be effective in a broad range of applications ranging from volatile organic compound (VOC) detection in soil and groundwater [16] to detection of land mines [17]. Additionally, the relative ease of construction and availability of materials make chemiresistors inexpensive, allowing both reusable and disposable applications to be considered.…”

Section: Introductionmentioning

confidence: 99%

Development of chemiresponsive sensors for detection of common homemade explosives.

Brotherton¹,

Wheeler²

2012

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Field-structured chemiresistors (FSCRs) are polymer based sensors that exhibit a resistance change when exposed to an analyte of interest. The amount of resistance change depends on the polymer-analyte affinity. The affinity can be manipulated by modifying the polymer within the FSCRs. In this paper, we investigate the ability of chemically modified FSCRs to sense hydrogen peroxide vapor. Five chemical species were chosen based on their hydrophobicity or reactivity with hydrogen peroxide. Of the five investigated, FSCRs modified with allyl methyl sulfide exhibited a significant response to hydrogen peroxide vapor. Additionally, these same FSCRs were evaluated against a common interferrant in hydrogen peroxide detection, water vapor. For the conditions investigated, the FSCRs modified with allyl methyl sulfide were able to successfully distinguish between water vapor and hydrogen peroxide vapor. A portion of the results presented here will be submitted to the Sensors and Actuators journal. 4 AcknowledgmentsThe authors would like to acknowledge Mark Rodriguez for the XRF measurements, Cody Washburn for use of the FTIR, and Doug Read for his guidance and insight.5

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In-Situ Chemiresistor Sensor Package for Real-Time Detection of Volatile Organic Compounds in Soil and Groundwater

Cited by 94 publications

References 15 publications

Development of a Surface Acoustic Wave Sensor for In-Situ Monitoring of Volatile Organic Compounds

Development of a Surface Acoustic Wave Sensor for In-Situ Monitoring of Volatile Organic Compounds

Sensors for environmental monitoring and long-term environmental stewardship.

Development of chemiresponsive sensors for detection of common homemade explosives.

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