分散油脂的浓度是水质量和安全的一个重要的参数。为了控制通过工业排放进入自然水体或水库中油脂的总量,全球监管机构设置限制范围;并且限定了饮用水中的总量。印度标准(IS 10500 规范)对于油脂排放到内陆地表水和公共下水道的含量分别为10mg/L 和20mg/L。然而,现有方法是基于正己烷作为萃取溶剂,作为一种碳氢化合物溶剂,正己烷会干扰油脂的红外分析测定。本文使用中红外光谱仪,按照“IS 3025 Part 39”标准方法,采用四氯化碳作为萃取溶剂,开发出水中油脂的含量分析。四氯化碳可以合适的替代正己烷,并且按照方法“IS 3025 Part 39”中指定的操作范围,该测试方法对于地表水或者饮用水中油脂排放监测具有足够地灵敏度。
Dan Berdovich(Micro Measurement Laboratories)了解他客户的注射剂样品中有蛋白质聚集体,但尽管有各种各样的高科技仪器可供他使用,但他仍然无法完全确信他能看到它们或获得精确计数。对于颗粒分析的权威机构,他们获得了关于注射药物产品目视检查标准的同行评审论文奖。 然而,虽然在工业市场中,使用颗粒成像技术的应用不到十年,但是Berdovich仍努力解决客户的问题以至他自己的业务获得成功。
This paper presents a methodology to evaluate the stability of cockles in shallow estuaries for different hydrodynamicconditions. Two methodologies are proposed in order to determine the suitability of the different regions of the estuaryfor cockles. Considering the complexity of all the processes which determine the movement of cockles, themethodology proposed here is intended to be a first approach to the problem taking into account only hydrodynamicvariables, although the inclusion of biological variables is being studied at the present time. The aim of this work is tostablish an objective criteria for comparing the stability of cockles in different parts of an estuary under differenthydrodynamic conditions. In order to perform this analysis we have developed a cockle habitat model model whichconsiders the hydraulic characteristics of cockles and the flow patterns in the estuary.