1.1 本规程包括使用蠕动泵从多个深度对液体进行采样。它适用于多种流体，包括:高粘度流体、侵蚀性和腐蚀性流体、高纯度溶液和研磨性流体。它特别适用于需要与泵完全隔离的液体取样。 1.2 该实践包括确定样品深度、泵设置和收集待分析样品。 1.3 本规程无意提供运行蠕动泵的详细说明，或建议购买哪种蠕动泵。它指导现场人员如何连接泵和采集样本。 1.4 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 所有观察值和计算值应符合实践中确定的有效数字和舍入准则 D6026 . 以国际单位制以外的单位报告试验结果不应视为不符合本标准。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 该规程可用于取样桶、储罐和类似容器，以及取样监测和废物井，包括小直径（2.5 厘米（1英寸）威尔斯。该泵可以从多个深度采集样本。样品可以是高粘度流体、侵蚀性和腐蚀性流体、高纯度溶液和研磨性流体。泵可用于混合样品（见指南 D6063 ). 5.2 蠕动泵使用真空来运输样品。这种真空可能会导致样品中挥发性有机化合物（VOCs）的一些脱气和损失。当不需要VOC和溶解气体的精确定量数据时，可以使用蠕动泵。 5.3 泵为自吸式，干燥运行，无损坏，与泵送流体完全隔离。 可以在泵的进气侧或排气侧取样。 5.4 蠕动泵的一些其他优点是:泵电机无需去污，泵中的管道是一次性的，易于更换。泵可以轻松启动和停止，并可以在很大的压力和流量范围内泵送液体。 5.5 采样的地点、质量和数量、频率和时间取决于要做出的决定（见实践） D6250 )，抽样设计（见指南 D6311 )，样本，样本的异质性（参见指南 D5956 )，样本的代表性如何（见指南 D6044 )，以及由数据质量目标（DQOs）确定的待测试参数（见实践 D5792 ).

1.1 This practice covers the use of a peristaltic pump for sampling liquids from multiple depths. It is applicable for a wide range of fluids including: high-viscosity fluids, aggressive and corrosive fluids, high-purity solutions, and abrasive fluids. It is especially useful for sampling liquids that require complete isolation from the pump. 1.2 This practice includes the determination of sample depth, pump setup, and collecting a sample to be analyzed. 1.3 This practice is not intended to give detailed instructions for running a peristaltic pump or to recommend which peristaltic pump to purchase. It instructs the field personnel how to connect the pump and collect a sample. 1.4 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026 . Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This practice can be used in sampling drums, tanks, and similar containers and in sampling monitoring and waste wells including small-diameter (2.5 cm (1 in.)) wells. The pump can collect samples from multiple depths. The samples can be high-viscosity fluids, aggressive and corrosive fluids, high-purity solutions, and abrasive fluids. The pump can be used to mix samples (see Guide D6063 ). 5.2 Peristaltic pumps use a vacuum to transport the samples. This vacuum may cause some degassing and loss of volatile organic compounds (VOCs) from the sample. When precise quantitative data for VOCs and dissolved gases are not required, peristaltic pumps may be used. 5.3 The pump is self-priming, runs dry without damage, and is completely isolated from the pumped fluid. A sample can be taken on the intake or discharge side of the pump. 5.4 Some additional advantages of the peristaltic pump are: decontamination of the pump motor is not necessary and the tubing in the pump is disposable and easy to replace. The pumps can be easily started and stopped and can pump fluids at a wide range of pressures and flow rates. 5.5 The place, quality and quantity, frequency, and time of sampling are dependent upon the decisions that are to be made (see Practice D6250 ), sampling design (see Guide D6311 ), the sample, the heterogeneity of the samples (see Guide D5956 ), how representative the sample is (see Guide D6044 ), and the parameters to be tested as determined by the data quality objectives (DQOs) (see Practice D5792 ).