Acquisition of an Ion Chromatograph (IC) for Water Quality Analyses in an Undergraduate-Led Lab

购买离子色谱仪(IC)将升级全女子巴纳德学院的水质分析设施。这笔资金将用于购买该仪器，培训用户，并使用户能够在国家会议上展示他们的成果。离子色谱仪将主要由巴纳德学院的本科生使用，以测量水质参数。阴离子数据对于理解影响水质的基本化学、物理和生物控制，以及水质如何随时间变化至关重要。例如，氯化物和溴化物可用于示踪自然和人为补给，而硝酸盐和亚硝酸盐是必要的营养物质，但也会影响水质。这些学生是合作团队的一部分，他们收集的数据将用于他们的本科生论文研究和同行评议的出版物。这些合作包括关注水质的国家和国际项目。例如，在纽约市设计绿色基础设施以改善径流的水质，在越南检查地下水以更好地了解与砷污染有关的地下水补给。与溶液中的离子浓度相比，少数测量对环境科学更基本。在过去的9年里，Mailloux实验室使用了安装在巴纳德学院的Dionex ICS-2000型离子色谱仪(IC)进行了这些测量，巴纳德学院是一所位于纽约市的本科女子S学院。这台主力乐器不幸地消亡了。它已被用于测量地下水、地表水和实验室实验中采集的水中的阴离子和低分子有机酸。自2008年9月购买仪器以来，我们已经运行了超过24,000个样品、空白和标准。来自这些测量的不同数据已被用于与PI的9篇同行评议论文，其中3篇论文有本科生合著者，8篇论文有研究生合著者。此外，IC已在至少19篇高级论文中使用，并经常在2个班级中使用。这个奖项的目标是更换损坏的乐器，以保持我们的研究势头，举办一个免费的短期课程，教学生如何使用新乐器，并带学生参加一个全国性的会议。我们要求的新仪器是Dionex Integrion，配有AS-AP自动进样器，可运行阴离子和低重量有机分子，如醋酸盐和乳酸盐。新仪器将用于NSF和非NSF项目，以分析本科生和研究生主导项目的现场和实验室实验样本。为了支持目前NSF使用该仪器的资金，我们目前的需求超过了每年2500个样品，并预计在仪器的整个生命周期内每年继续运行数千个样品。从这些测量中获得的数据将支持同行评议的研究和出版物，以及对许多年轻女性的教育。新仪器将使我们能够继续在巴纳德学院进行世界级的、由学生主导的关于水质、水文学和生物地球化学的研究。

The acquisition of an Ion Chromatograph (IC) will upgrade the water quality analysis facilities at the all-women's Barnard College. The funding will be used to purchase the instrument, to train users, and to enable users to present their results at national conferences. The Ion Chromatograph will be used by mainly undergraduate students at Barnard College to measure water quality parameters. The anion data is critical for understanding the fundamental chemical, physical and biological controls that affect water quality, and how that water quality changes over time. For example Chloride and Bromide can be used to trace natural and anthropogenic recharge whereas nitrate and nitrite are essential nutrients but can also impact water quality. The students are part of collaborative teams and the data they collect will be used in their undergraduate thesis research and peer-reviewed publications. These collaborations include both national and international projects looking at water quality. Examples include engineering green infrastructure in New York City to improve water quality of runoff and examining groundwater in Vietnam to better understand groundwater recharge in relation to Arsenic contamination.Few measurements are more fundamental to environmental science than the concentration of ions in solution. Over the last 9 years, the Mailloux lab has conducted these measurements using a Dionex ICS-2000 Ion Chromatograph (IC) housed at Barnard College, an undergraduate women?s college in New York City. This workhorse instrument has sadly died. It had been used to measure anions and low molecular organic acids in water collected from groundwater, surface water, and laboratory experiments. Since the instrument was bought in September 2008 we have run over 24,000 samples, blanks, and standards. The diverse data from these measurements has been used in 9 peer-reviewed papers with the PI, with 3 of the papers having an undergraduate co-author and 8 of the papers having a graduate student co-author. In addition, the IC has been used in at least 19 senior theses and is regularly used in 2 classes. The goal of this award is to replace the broken instrument in order to maintain our research momentum, run a free short course to teach the students how to use the new instrument, and to take students to a national meeting. The new instrument we are requesting is a Dionex Integrion with an AS-AP autosampler equipped to run anions and low weight organic molecules such as acetate and lactate. The new instrument will be used on NSF and non-NSF projects to analyze samples from both the field and laboratory experiments on undergraduate and graduate student led projects. To support current NSF funding using this instrument, we have current demand in excess of 2500 samples per year, and expect to continue to run thousands of samples per year over the life of the instrument. The data obtained from these measurements will support peer reviewed research and publications, and the education of many young women. The new instrument will enable us to continue to perform world-class, student-driven research on water quality, hydrology, and biogeochemistry at Barnard College.