Abstract
The cost of high-resolution water sampling devices for ecological studies and water quality analyses can be prohibitive. Moreover, the potential for operator error in the use of complicated sampling equipment can lead to inaccuracies. Here we describe the construction and operation of an inexpensive and easy-to-use water sampler that achieves a water column sampling resolution of approximately 1 cm. The device is driven by a peristaltic pump and is constructed entirely of non-corrosive and non-reactive materials. The sampler has no moving parts and was completely reliable in fieldwork on temperate and Antarctic lakes. The device is especially suited for the collection of water samples from calm or stagnant surface waters, such as lakes, ponds, reservoirs, and deep swamps or other wetlands. In addition, because its components are unaffected by corrosive salts and sulfides, the device is suitable for sampling calm inlet waters, including shallow bays and estuaries. Because of its low cost, simple construction, compact design, and precision performance, this water sampler is an excellent option for studying and monitoring shallow to moderately deep (<50 m) natural waters.
Highlights
Precise, high-resolution sampling of natural waters with depth can be difficult and costly
Most commercially available water samplers suitable for limnological studies are expensive and incapable of the precision water column sampling desirable in many research applications
We were unable to identify a commercially available water sampler that could match the resolution provided by a device we describe
Summary
High-resolution sampling of natural waters with depth can be difficult and costly. Most commercially available water samplers suitable for limnological studies are expensive and incapable of the precision water column sampling desirable in many research applications. Bottle-type water samplers, such as Van Dorn samplers and Niskin bottles, are essentially elongated tubes that use a spring-loaded, cable-retained triggering mechanism to capture a water sample at a desired depth. This action has the disadvantage of significantly disturbing and mixing the water column upon collection of the sample [1]. This compromises sampling resolution, especially when sampling multiple depths through narrow and often highly dynamic thermal or chemical gradients, and may skew physicochemical data collection
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
