category-autoanalyzer
Various Pump Tubing Materials, Compatibility and Applications Peristaltic pumps rely on compressing and releasing a length of flexible tubing to mimic natural peristalsis seen in many biological systems, using positive displacement to move fluids in a steady and smooth pulsing manner. Instrument Systems will remain contamination-free using peristaltic pump tubes, since the only part of [...]
Peristaltic Pump Tube Sizes by Color Code Determines ID and Ease of Application Uses: As mentioned in this series on Ismatec Peristaltic pumps and Peristaltic pump tubes in general, the advantage with this type of pumping configuration is that the pumps are able to handle heavier and more aggressive fluids. The peristaltic pump tubes have [...]
As we mentioned in our last blog article, changing pump tube sizes for a method might be necessary when changing an analytical range or when developing new chemistries. The EPA has even weighed in on this matter with their "Flexibility to Modify CWA Methods" memorandum. They go on to outline specific modifications that no longer require case [...]
Our new blog series will be covering all aspects of peristaltic pump tubing and will be addressing questions and topics concerning peristaltic pump tubes and the Ismatec peristaltic pump. Below is a chart we refer to to understand the sizes and flow rates between pump tubes. This can be useful when developing new chemistries and changing the [...]
This post is designed to offer assistance to users of cadmium coils in the analysis of Nitrate. Since the use of the cadmium coil is fairly complicated and because there are many possible applications, we want to discuss the different sizes that are available as well as the advantages of the various sizes. Cadmium coils [...]
Old Surfactant Solution Causes Problems in Cadmium Reduction Coils In our earlier blog posts we have discussed many reasons for possible loss of cadmium coil reduction efficiency. Along with metal contamination, nitrate contamination and gas contamination, we have also seen old surfactant solution cause problems in cadmium reduction coils. Because of the unstable nature of [...]
Get the most life out of your cadmium reduction coil... The Proper Technique to Activate a Cadmium Reduction Coil In order to create a good copper complex it is important to use acid to clean and prepare the surface of the cadmium. Cadmium is very susceptible to destruction if the acid concentration is too high [...]
An Overview of Caring For and Using a Cadmium Reduction Coil in the Determination of Nitrate. Over the years, we've fielded a lot of questions from clients about how to operate and get the most out of their cadmium coils. Cadmium coils are fairly complicated and there are definitely areas for problems to occur. Sometimes [...]
Sample line tubing and connections need more attention with Gas Diffusion Chemistries The gas diffusion methods for analyzing Ammonia, Total Keldahl Nitrogen and the various species of Cyanide have produced a few specific problems not normally seen on classic colorimetric chemistries run on an autoanalyzer. Due to the precise nature of the gas passing across [...]
Further Discussions Our last blog post about how much better Teflon is than glass resulted in extensive responses from many different users. Some users were in agreement, some were thankful for the facts regarding how much better the physical properties of Teflon are over glass and others were somewhat confused. The main confusion has to [...]
