资料摘要
资料下载Field validation of modeling predictions for the new sanitation system of the Bay of Santander were carried out through the implementation of an objective-oriented Environmental Monitoring Program (EMP), which enclosed the control of water bodies, quality of sediments and ecological status of benthos communities in the areas affected by continuous (outfall) and sporadic (combined sewer overflows) discharges. Surveillance of salubrity of bathing waters, aesthetic deterioration, trophic status of the coastal and estuarine water bodies, benthic pollution effects and bioaccumulation were some of the preliminary environmental objectives adopted by the EMP. However, because of the adaptive design of the monitoring programs, case-specific modifications were introduced. In agreement with the predictions of the environmental design of the sanitation system, no significant effects of the outfall discharges in the quality of water, sediments and biological communities were detected and the recovery of estuarine ecosystems has already been initiated.
AQ2化学分析仪的优点
简介:1. 每日准备时间短。不需要基线稳定,机器预热之后可以直接测定 2. 测定所需样品量少。3-500微升样品量。低耗更环保。 3. 采用固定清洗池及特殊探针清洗器,内外冲洗,彻底避免交叉污染;可拆卸式样品盘,方便大批量样品测试及时更换; 4. 有更好的温度控制能力,化学反应槽的温度可根据方法需要进行设定,达到所需的反应温度;楔形试剂瓶、试剂室带低温冷藏功能,保证试剂的稳定,防止试剂挥发,保证了试剂的稳定性和寿命; 5. 多指标同时测定。同一个样品不同指标,能够在一个程序中连续测定完成,不需要重新另起程序。 6. 反应后溶液被吸样针吸入10mm石英比色皿中静态进行比色,比色池和反应池相互独立,无需移动,保证每个样品的测定发生在同一位置,且温度稳定,消除反应池变化及刮伤对读数系统的影响,达到最佳的重现性;具有独立的密封,避免外界光线的影响,确保最佳信噪比,并避免了昂贵的比色池消耗。
片断流技术与流动注射技术的比较
简介:连续流动分析技术分为两种方法: ① 片断流技术-——用空气气泡或氮气气泡将样品分开成一小段一小段。 ② 流动注射技术-——没有空气气泡,利用扩散将样品和试剂混合。 虽然流动注射技术是后发展的技术,但实际上它在理论上不完善,应用上受到限制,特别是对于反应过程较为复杂或要求反应时间较长的化学参数测量具有致命的弱点,在准确度和稳定性、重复性上较片断流技术有很大的距离,其优点是造价成本便宜得多。下面分成八个部分来谈一谈片断流技术的优点。
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