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Our Conductivity + Dielectric constant (C+D) detector has multiple functions and uses. Please click on Brochure link above. A few additional examples are given below.



Detecting ions in de-ionized water using UNS-Tech’s conductance detector

Detection of ions at low concentrations, requiring high performance, highly sensitivity detectors, is indispensable for a wide variety of applications, from nanotechnology to medical research to environmental monitoring. High performance detectors tend to be large and expensive and are thus typically restricted to in-laboratory use. UNS-Tech introduces propriety conductance detectors that are highly sensitive, ultra-low volume, compact, cost effective, and suitable for both bench-top and portable applications.


plot graph conductance vs time vs concentration



Utility of UNS-Tech’s Conductivity + Dielectric constant (C+D) detection to determine the cleanliness of lab labware

Confirmation of the cleanliness of labware such as vials, bottles, beakers, etc. is essential to good laboratory and manufacturing practices. A key step in the cleaning process is ensuring that labware has been rinsed sufficiently with some suitable solvent. In this application note, we use a unique feature of UNS-Tech’s detector characterize both conductivity and dielectric constant to monitor cleanliness of a new scintillation vial after rinsing.


graph plot conductance dielectric vs time





Cost effective determination of inorganic cation concentration in drinking water using UNS-Tech’s Conductivity + Dielectric constant (C+D) detector and ion chromatography

Ion chromatography (IC) equipped with a conductivity detector is commonly used to determine inorganic ion concentration in and cleanliness of drinking water.

UNS-Tech’s Conductivity + Dielectric constant (C+D) detector offers a number of features for this application. It is cost effective, has an ultra low cell constant which facilitates high conductance and sensitivity, only requires a few μL of sample volume, and can be easily retrofit to an existing chromatography system using standard 1/16”-OD fittings. In this application note, UNS-Tech's detector was retrofit into a commercial IC system and used to determine the concentration of inorganic cations (Na, K, Mg, and Ca) present in drinking water. Comparison tests using UNS-Tech's detector yield the same results as those of a leading manufacturer.

graph calibration

graph drinking water



Lipid (Phosphatidylcholine) detection in methanol by UNS-Tech’s Conductivity + Dielectric constant (C+D) detector

Lipids are typically difficult to detect using ultraviolet visible detectors as these molecules often lack chromophores. Phosphatidylcholine (PC) is one important example. PC is a phospholipid, a major component of biological membranes, and has medical application for the treatment of various types of hepatitis. It can be obtained from a variety of sources such as egg yolk or soy beans.

The present application note demonstrates that PC can be detected using UNS-Tech’s Conductivity + Dielectric constant (C+D) detector over a wide range of concentrations (from 1 mM to 500 mM). The detector’s response is found to be linear from 1 mM to 100 mM. A key feature of the detector for the present application is that due to its small detection volume, costly large volumes of biomolecule solutions are not required. Also, although the detector in the present application is used as a stand alone bench-top unit, it can also be used as a detector for various types of chromatography such as high performance liquid chromatography, ion chromatography, etc. by employing standard fittings.

graph lipids