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

离子色谱仪（IC）的收购将升级在全女子巴纳德学院的水质分析设施。这笔资金将用于购买仪器，培训用户，并使用户能够在国家会议上介绍他们的结果。离子色谱仪将主要被巴纳德学院的本科生用来测量水质参数。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追踪自然和人为补给，而硝酸盐和亚硝酸盐是必需的营养物质，但也会影响水质。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论文研究和同行评审的出版物。这些合作包括着眼于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地下水补给与砷污染的关系。对环境科学来说，没有什么测量比溶液中离子的浓度更重要了。在过去的9年里，Mailloux实验室一直使用存放在巴纳德学院的Dionex ICS-2000离子色谱仪（IC）进行这些测量。他是纽约的一所大学。这台主力乐器不幸地死了。它已被用于测量从地下水、地表水和实验室实验中收集的水中的阴离子和低分子有机酸。自2008年9月购买该仪器以来，我们已经运行了超过24,000个样品，空白和标准品。来自这些测量的不同数据已用于PI的9篇同行评议论文中，其中3篇论文的合著者是本科生，8篇论文的合著者是研究生。此外，至少有19篇毕业论文使用了IC，并在2门课程中经常使用IC。这个奖项的目的是更换坏掉的仪器，以保持我们的研究势头，开办一个免费的短期课程，教学生如何使用新仪器，并带学生参加一个全国性的会议。我们要求的新仪器是带有as - ap自动进样器的Dionex Integrion，配备了阴离子和低质量有机分子（如醋酸盐和乳酸盐）。新仪器将用于国家科学基金和非国家科学基金项目，用于分析本科生和研究生领导的项目的现场和实验室实验样品。为了支持目前使用该仪器的NSF资金，我们目前每年需要超过2500个样品，并期望在仪器的使用寿命期间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，并支持许多年轻妇女的教育。新仪器将使我们能够继续在巴纳德学院进行世界一流的、学生驱动的水质、水文学和生物地球化学研究。

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.