Acquisition of a tunable diode laser absorption spectroscopic isotope analyzer and peripheral induction furnace

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。 该合同将资助购买一台新的可调谐二极管激光吸收光谱同位素分析仪（TDLAS）和一台台式感应炉。 我们打算：1）在受控手套箱中校准该系统，然后继续在新墨西哥州和莫纳罗亚场址进行大气水蒸气研究; 2）进行蒸发和冷凝的受控实验室研究，以便更好地了解对大气水蒸气成分的控制，特别是氘过量参数;（3）建立了流体包裹体中H、O同位素分析的提取方法：（4）建立了含水矿物、名义无水矿物和地外物质H同位素分析的提取方法;（5）建立粘土矿物中H、O同位素的分步加热提取方法;（6）研究格兰德河流域生态系统中与蒸散相关的H、O同位素比值;（7）测定土壤气体（土壤水）的H、O同位素值。 在这项工作的过程中，我们将提供一个准确的校准系统在低大气p（H2O），并开发分析程序，将有利于整个地质社区提供新的“前端”应用程序的TDLAS system.The TDLAS将成为一个不可分割的一部分，在新墨西哥州大学（UNM）的研究和教学。UNM是全国仅有的三所大学之一，被指定为西班牙裔服务机构和卡内基博士/研究型大学，该实验室经常雇用少数民族和/或女性本科生在实验室工作或作为本科生荣誉研究项目的一部分。TDLAS将是我们正在进行的计划的重要组成部分，让本科生参与研究，因为它易于使用，他们可以积极参与本提案中概述的项目。该仪器还将用于环境研究和稳定同位素课程的教学，因为它只需要最少的指导即可使用。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This award will fund the acquisition of a new tunable diode laser absorption spectroscopy isotope analyzer (TDLAS) and a tabletop induction furnace. We intend to: 1) Calibration the system in a controlled glove box, followed by a continuation of atmospheric water vapor studies in New Mexico and at the Mauna Loa site; 2) undertake controlled laboratory studies of evaporation and condensation in order to better understand controls on the composition of atmospheric water vapor, particularly the deuterium-excess parameter; 3) Develop an extraction procedure for analysis of H and O isotopes from fluid inclusions; 4) Develop an extraction procedure for H isotope analysis for hydrous minerals, nominally anhydrous minerals and extraterrestrial materials; 5) Develop a step-heating extraction procedure for H and O isotopes from clay minerals; 6) Study H and O isotope ratios related to evapo-transpiration in the Rio Grande Valley ecosystem; and 7) Measure H and O isotope values of soil gas (soil water). In the course of this work, we will provide an accurate calibration of the system at low atmospheric p(H2O), and develop analytical procedures that will benefit the overall geological community by providing novel 'front-end' applications to the TDLAS system.The TDLAS will become an integral part of research and teaching at the University of New Mexico (UNM). UNM is one of only three Universities in the country that is designated as both a Hispanic-serving institution and a Carnegie Doctoral/Research Extensive University, and this laboratory routinely hires minority and/or women undergraduate students to work in the laboratory or as part of a undergraduate honors research project. The TDLAS will be an important part of our ongoing program to involve undergraduates in research because it is easy to use, and they can be active participants in the projects outlined in this proposal. The instrument will also be used for teaching in environmental studies and stable isotope courses, as it can be used with only minimal instruction.