کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6479301 1428384 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hyperspectral analysis for standoff detection of dimethyl methylphosphonate on building materials
ترجمه فارسی عنوان
تجزیه و تحلیل بیش از حد برای تشخیص جدا شدن دی متیل فسفونات در مصالح ساختمانی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


- Dimethyl methylphosphonate was detected utilizing hyperspectral imaging.
- Absorbance bands at 1275 cm−1 and 1050 cm−1 were associated with phosphorus-containing bonds.
- Spectral contrast angle analysis distinguished bare and contaminated surfaces.

Detecting organophosphates in indoor settings can greatly benefit from more efficient and faster methods of surveying large surface areas than conventional approaches, which sample small surface areas followed by extraction and analysis. This study examined a standoff detection technique utilizing hyperspectral imaging for analysis of building materials in near-real time. In this proof-of-concept study, dimethyl methylphosphonate (DMMP) was applied to stainless steel and laminate coupons and spectra were collected during active illumination. Absorbance bands at approximately 1275 cm−1 and 1050 cm−1 were associated with phosphorus-oxygen double bond (PO) and phosphorus-oxygen-carbon (POC) bond stretches of DMMP, respectively. The magnitude of these bands increased linearly (r2 = 0.93) with DMMP across the full absorbance spectrum, between ν1 = 877 cm−1 to ν2 = 1262 cm−1. Comparisons between bare and contaminated surfaces on stainless steel using the spectral contrast angle technique indicated that the bare samples showed no sign of contamination, with large uniformly distributed contrast angles of 45°-55°, while the contaminated samples had smaller spectral contact angles of <20° in the contaminated region and >40° in the uncontaminated region. The laminate contaminated region exhibited contact angles of <25°. To the best of our knowledge, this is the first report to demonstrate that hyperspectral imaging can be used to detect DMMP on building materials, with detection levels similar to concentrations expected for some organophosphate deposition scenarios.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 108, 1 November 2016, Pages 135-142
نویسندگان
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