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首页> 外文会议>IMEKOFOODS Conference >P44: AN INTEGRATED EVALUATION APPROACH FOR METRIC COMPARISON OF ANALYTICAL TECHNIQUES, BASED ON DIVERSE REQUIREMENTS. APPLICATION IN SELECTION OF SUITABLE TECHNIQUE FOR AMMONIUM DETERMINATION IN POTABLE AND RECYCLED HYGIENE WATER, TO BE USED IN MANNED SPACE MISSIONS
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P44: AN INTEGRATED EVALUATION APPROACH FOR METRIC COMPARISON OF ANALYTICAL TECHNIQUES, BASED ON DIVERSE REQUIREMENTS. APPLICATION IN SELECTION OF SUITABLE TECHNIQUE FOR AMMONIUM DETERMINATION IN POTABLE AND RECYCLED HYGIENE WATER, TO BE USED IN MANNED SPACE MISSIONS

机译：P44：基于各种要求，分析技术的公制比较综合评价方法。在储存和再生卫生水中铵测定选择合适技术的应用，用于载有载有载物的空间任务

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Water is a basic human need and is provided to the crew of International Space Station (ISS) from the water storage/transfer systems that are placed in there. Except of the direct regular supply of drinking water, the development of proper water recycling systems is equally critical as the employment of reliable automatic water quality monitoring systems. A fully automated on-line analyzer for ammonium determination in consumed drinking water and/or recycled hygiene water produced on board the ISS is needed according to ESA requirements. In this work, a trade-off methodology similar to a weighted-point method, was developed to evaluate appropriate analytical systems, adaptable to space flight requirements. The developed scoring methodology for the assessment of the suitability of the techniques, was based on scales and weighting factors for various applied criteria, like analytical performance (e.g. LOD, LOQ, accuracy, repeatability), adaptation to space flight conditions (e.g. microgravity applicability, volume/mass of the analyzer, solutions consumption, wastes production etc.), safety criteria (e.g. use of hazardous materials/reagents, pressure, heating, flammability), etc. as provided by the manufacturers or in literature. The evaluation approach offers a somehow arbitrary in metrics but still reasonable and countable discrimination between analytical techniques. This evaluation method is a first-time metrological contribution to the frequently appearing issue to select between available techniques taking into account diverse requirements. The proposed approach may be applicable also to evaluation needs for specific analytical techniques/methods, in order to be employed for various other customized purposes. In this particular case, among several technologies which were investigated, sequential injection systems meets the specifications for on-line monitoring in space conditions as it is an integrated flow manifold with small dimensions operating in a totally closed loop preventing any contact or release of the fluids/gases inside the space environment. Also, an appropriate ammonium ion selective electrode with real-time potassium compensation may be used as an alternative solution.
机译：水是一种基本的人类需求，并提供给国际空间站（ISS）的船员，从被放置在那里的水储存/转移系统。除了直接常规供应饮用水之外，适当的水循环系统的发展与采用可靠的自动水质监测系统一样重要。根据ESA要求，需要在船上产生的消耗饮用水和/或再生卫生水中铵测定的全自动在线分析仪。在这项工作中，开发了一种类似于加权点方法的权衡方法，以评估适当的分析系统，适应空间飞行要求。为评估技术的适用性的发达评分方法是基于各种应用标准的尺度和加权因素，如分析性能（例如LOD，LOQ，准确性，重复性），适应空间飞行条件（例如微匍匐实用性，分析仪的体积/质量，解决方案消耗，废物生产等），安全标准（例如，使用制造商或文学提供的危险材料/试剂，压力，加热，易燃性）等。评估方法在指标中提供了一个以某种方式，但分析技术之间仍然是合理和可数的识别。该评估方法是对频繁出现的问题的第一次计量贡献，以考虑到不同要求的可用技术。该提出的方法也可以适用于特定分析技术/方法的评估需求，以便用于各种其他定制的目的。在这种特殊情况下，在研究的若干技术中，顺序注射系统满足空间条件下在线监测的规范，因为它是具有在完全闭合的环路中操作的小尺寸的集成流动歧管，防止了流体的任何接触或释放的小尺寸/空间环境内的气体。此外，可以使用具有实时钾补偿的合适的铵离子选择性电极作为替代溶液。

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