1 research outputs found
Universal HPLC Detector for Hydrophilic Organic Compounds by Means of Total Organic Carbon Detection
Most quantifications are achieved
by comparison of the signals
obtained with the sample to those from a standard. Thus, the purity
and stability of the standard are key in chemical analysis. Furthermore,
if an analyte standard cannot be obtained, quantification cannot be
achieved, even if the chemical structures are identified by a qualification
method (e.g., high-resolution mass spectrometry). Herein, we describe
a universal and analyte standard-free detector for aqueous-eluent-based
high-performance liquid chromatography. This universal carbon detector
(UCD) was developed based on total organic carbon detection. Separated
analytes were oxidized in-line and converted to carbon dioxide (CO<sub>2</sub>). Generated CO<sub>2</sub> was transferred into the gas phase
and collected into ultrapure water, which was followed by conductivity
detection. The system can be applied as a HPLC detector that does
not use an organic solvent as an eluent. The system can be calibrated
with a primary standard of sodium bicarbonate for organic compounds.
The universality and quantification were evaluated with organic compounds,
including organic acids, sugars, and amino acids. Furthermore, the
system was successfully applied to evaluation of the purity of formaldehyde
in formalin solution, and determination of sugars in juices. The results
show the universal carbon detector has good universality and can quantify
many kinds of organic compounds with a single standard such as sodium
bicarbonate