Monitoring Pesticide Exposure and Accumulation: An improved Rapid Identifier for all Pesticide Classes

监测农药暴露和积累：针对所有农药类别的改进快速识别器

• 批准号: 8903333
• 负责人: KEVIN M SPENCER
• 金额: $ 14.99万
• 依托单位: EIC LABORATORIES, INC.
• 依托单位国家: 美国
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-03-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8903333
• 关键词: 4-nitrophenol; Adsorption; Amines; Atrazine; Automation; Azides; Biological; Biology; Body Fluids; Calibration; Camping; Chemicals; Chlorinated Hydrocarbons; Communities; Complex; Coupled; Data; Data Set; Databases; Detection; Diesel Fuels; Electrons; Elements; Environmental Monitoring; Environmental Pollution; Epidemiologic Studies; Exposure to; Film; Food Supply; Goals; Health; Human; Humidity; Hydrogen Bonding; Ingestion; Laboratories; Least-Squares Analysis; Life; Liquid substance; Measures; Methods; Methyl Parathion; Monitor; National Institute of Environmental Health Sciences; Organophosphates; Outcome; Pesticide Residues; Pesticides; Phase; Population; Populations at Risk; Process; Protocols documentation; Raman Spectrum Analysis; Reading; Reporting; Reproducibility; Research; Resolution; Sampling; Signal Transduction; Silver; Simazine; Small Business Innovation Research Grant; Solutions; Source; Spectrum Analysis; Statistical Algorithm; Sunlight; Surface; Techniques; Technology; Temperature; Testing; Time; Triazines; United States National Institutes of Health; Urinalysis; Urine; Work; cost; cost effective; design; electron density; farm worker; high risk; improved; innovation; interest; novel; organochlorine pesticide; pesticide exposure; planetary Atmosphere; programs; public health relevance; sensor; surface coating; tool; ultraviolet irradiation; vapor

 DESCRIPTION (provided by applicant): An inexpensive disposable vapor sensor, which can also be used for urinalysis, can provide rapid field monitoring of pesticide exposure. The sensor utilizes Surface-Enhanced Raman Spectroscopy (SERS) to detect chemicals, like pesticides, that adsorb strongly on roughened SERS substrates in the high parts-pre- trillion range. As the sensors are tuned to the analytes of interest, interferences from more concentrated chemicals are limited. An earlier research program provided reliable results for organophosphate (OP) and organochlorine (OC) pesticides. In that program, 50 OP and OC pesticides or metabolites were evaluated in the laboratory at the low ppb range, with acephate and methyl parathion detection at farmworker camps. In this program, we will fabricate an innovative SERS sensing element for the detection of triazine pesticides, such as atrazine, simazine and cyromazine. Sensors will be optimized by an azide loading to improve the electron density and yield strong hydrogen bonding with the triazine amine groups. This novel sensor is expected to detect triazines in concentrations of 1 ppb or less and withstand the temperature and humidity conditions encountered by farmworkers. The new sensor can be easily combined with our previous sensor to measure >75 pesticides or metabolites at a fraction of the cost of current analytical laboratory methods, thus providing the NIH (particularly the NIEHS Exposure Biology program) with a large data set on the daily exposure/ingestion of pesticides. This data will allow epidemiological studies and predictions of long-term health outcomes. Core technology concepts have been demonstrated. A previous program demonstrated organochlorine and organophosphate pesticides can be detected down as low as 100 ppt. EIC Laboratories has demonstrated in preliminary studies that an azide-coated SERS sensor is several orders of magnitude more sensitive to triazines than previous sensors. The Phase I program is designed to demonstrate detection of triazine pesticides and metabolites at the 1 ppb level, show an extended field lifetime and an increased sensitivity for direct readings of triazine pesticide metabolites.