Simultaneous Detection of Anions and Carbohydrates in Cyanobacteria by Two-Dimensional Ion Chromatography

Release time:2023-10-19 Hits:

Key Words:ALPHA-D-GLUCOSYLGLYCEROL; EXCHANGE CHROMATOGRAPHY; AMINO-ACIDS; SUCROSE; WATER

Abstract:Background: The simultaneous analysis of several anions and carbohydrates by one-dimensional chromatography with a single detector is often complicated by the presence of overlapping peaks. To overcome this problem, analytes are usually analyzed separately making analysis long and tedious. Objective: A method combining two-dimensional ion chromatography (2D-IC) and valve switching was developed for the simultaneous determination of anions (F-, Cl-, NO2-, SO42-, NO3-, and PO43-) and carbohydrates (glycerin, glucosyl glycerol, trehalose, mannose, glucose, galactose, fructose, ribose, and sucrose) in cyanobacteria. Method: Interfering color compounds were removed by first passing the sample through graphitized carbon solid phase extraction (SPE) cartridges. Samples were applied to an AS11-HC column, which was used to separate the anions followed by quantification using a conductance detector. Carbohydrates eluted from the AS11-HC column were trapped and separated on a MA1 column and simultaneously quantified using electrochemical detection in the second dimension with valve switching. Results: The following parameters were established: LOD, 0.001-0.030 (mg/L); LOQ, 0.001-0.010 (mg/L); linearity (R-2), 0.9940; repeatability, 0.39-3.02%; and spiked recovery, 90.1-107%. Conclusions: The proposed method is adequately linear, accurate, and repeatable. The 2D-IC method provides fast, high-resolution, and completely automated procedure for the simultaneous determination of anions and carbohydrates without co-elution compared to the 1D ion chromatography method. This study provides application perspectives for use in biotechnology and other research fields. Highlights: An accurate and effective 2D-IC method was developed for determining anions and carbohydrates in cyanobacteria. The method includes pre-treating samples with graphitized carbon SPE cartridges.

Volume:104

Issue:5

Translation or Not:no