联合王国1989年的《供水（水质）条例》于1999年进行了修订，其中包括对饮用水的持续监测 隐孢子虫。修订后的条例要求出席会议的人数少于一人 根据1000升样本，在24小时内采集10升饮用水中的卵囊 小时周期。与通用Filta一起运行EnvirochekTM STD的初步试验- 事实证明，MaxTM并不令人满意。这是因为在高水头压力下 过滤器损坏，回收的沉积物量是过滤器的一半- Max.Pall现在修改了原始过滤器，并将其命名为EnvirochekTM HV。 通过测试表明，过滤器改造可以消除两个位置的过滤器坍塌 高差压和流量变化。 使用三种不同类型的净化水对过滤器进行评估: 一 高地水；低地的水；还有钻孔补给。全部的 在60天的时间内，以100%的流速连续监测了三个现场 每天1000升。EnvirochekTM HV与Filta MaxTM一起于10月10日运行 60天期限中的天。过滤器被植入已知数量的卵囊 每天，如果两个过滤器并排运行，则测试条件相同 都被使用了。评估包括在每个地点进行48小时采样和偏差测试 用于给过滤器播种的卵囊浓度是不同的。阴性对照 这两种产品同时运行。收集的其他数据包括 24小时后流过测试过滤器，并测量压差 在测试期间，通过EnvirochekTM过滤器的压力。完工后 采样期间，将样本运回实验室进行检测 分析 使用标准操作方案（浓缩）从过滤器中洗脱卵囊 通过离心和免疫磁珠从不需要的颗粒物中清除 分离然后将样品点在载玻片上，用甲醇固定，染色 然后用单克隆抗体计数。 包括19个参考文献、图表。

The Water Supply (Water Quality) Regulations 1989 in the United Kingdom were amended in 1999 to include the continuous monitoring of drinking water for Cryptosporidium. The amended Regulations require the presence of less than one oocyst in 10 litres of drinking water based on a 1,000 litre sample, taken over a 24 hour period. An initial trial to run the EnvirochekTM STD alongside the Genera Filta- MaxTM proved unsatisfactory. This was because under high headloss pressure the filter became damaged and the amount of deposit recovered was half that of the Filta- Max. Pall has now modified the original filter and named this the EnvirochekTM HV. Filter modification has shown through testing to eliminate filter collapse at both high differential pressure and changes to flow. The filter was evaluated using three differing types of treated water: an upland water; a lowland water; and, a borehole supply. All three sites were monitored continuously, over a period of 60 days, at a flow rate of 1,000 litres per day. The EnvirochekTM HV was run alongside the Filta-MaxTM on 10 days out of the 60 day period. Filters were seeded with a known quantity of oocysts daily and where both filters were run alongside each other, the same test conditions were used. The evaluation included 48 hour sampling at each site and bias testing where the oocyst concentration used to seed the filters was varied. Negative controls were run at the same time for both products. Additional data collected included the flow through the test filter after 24 hours and the measurement of the differential pressure across the EnvirochekTM filter over the test period. On completion of the sampling period, the samples were then transported back to the laboratory for analysis. Oocysts were eluted from the filters using a standard operating protocol, concentrated by centrifugation and cleaned from unwanted particulate matter by immunomagnetic separation. The sample was then spotted onto slides and fixed with methanol, stained with a monoclonal antibody and then counted. Includes 19 references, figures.