• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Commission of Agricultural Engineering(CIGR) International Conference >Optimal Selection of Mid-Infrared Wavelengths for Determination of Nitrate in Soil using ATR Spectroscopy
【24h】

Optimal Selection of Mid-Infrared Wavelengths for Determination of Nitrate in Soil using ATR Spectroscopy

机译：使用ATR光谱法测定土壤中硝酸盐中的中红外波长的最佳选择

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent studies have shown that attenuated total reflectance (ATR) spectroscopy in the mid-infrared (mid-IR) range could be used to determine nitrate concentration in soil pastes. While these results were obtained using continuous spectra and chemometric methods (such as partial least squares-PLS), the present study investigates the possibility of using only spectral absorbance at several fixed wavelengths. A three-step procedure for determining the most appropriate wavelengths, as well as their width, is described. This procedure is applied to a dataset that includes eleven soils with various nitrate concentrations ranging from 0 to approximately 150 mg[N]/kg[dry soil]. The results show that nitrate concentration can be determined with only four wavelengths, namely 1280, 1330, 1379, and 1430 cm{sup}(-1). The prediction errors range from approximately 1.5 to 14.0 mg[N]/kg[dry soil], depending on soil composition and moisture content. For the lighter soils, which are the most vulnerable pollutionwise, the errors are inferior to 10 mg[N]/kg[dry soil]. These results are similar to results obtained by applying PLS to the continuous spectrum, and indicate that the development of a soil nitrate ATR sensor based on a few fixed mid-IR wavelengths could be considered.
机译：最近的研究表明，中红外（中红外）范围中的衰减总反射（ATR）光谱可用于确定土壤浆料中的硝酸盐浓度。虽然使用连续光谱和化学计量方法（例如局部最小二乘-PL）获得这些结果，但本研究研究了仅在几个固定波长下使用光谱吸光度的可能性。描述用于确定最合适的波长以及它们的宽度的三步过程。该过程应用于数据集，该数据集包括具有各种硝酸盐浓度的11个土壤，范围为0至约150mg [N] / kg [干燥土壤]。结果表明，硝酸盐浓度可以仅用四个波长，即1280,1330,1379和1430cm {sup}（ - 1）测定。根据土壤组合物和水分含量，预测误差范围为约1.5至14.0mg [n] / kg [干燥土壤]。对于较轻的土壤，这是最脆弱的污染，误差较差至10mg [n] / kg [干燥土壤]。这些结果类似于通过将PLS向连续光谱施加到连续光谱而获得的结果，并且可以考虑基于少量固定的中红外波长的土壤硝酸盐ATR传感器的开发。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号