AI Article Synopsis
- A method was developed for determining '-ethylenediamine disuccinic acid (EDDS) in bioconversion samples using high performance liquid chromatography (HPLC) with specific conditions.
- The analysis utilized an InertSustain AQ-C column at 30℃, with a mobile phase composed of methanol and other reagents, achieving separation of EDDS from similar acids within 8 minutes.
- The method demonstrated good linearity for EDDS detection, identifying about 0.25 g/L in enzyme-catalyzed reactions while confirming the enzyme's activity by producing malic acid from EDDS.
Article Abstract
A method was developed for the determination of '-ethylenediamine disuccinic acid (EDDS) in bioconversion samples by high performance liquid chromatography (HPLC). An InertSustain AQ-C column (250 mm×4.6 mm, 5 μm) was used in the analysis. The mobile phase was 25% (v/v) methanol with 1.0 g/L Cu(COCH)·HO, 2.0 g/L tetrabutylammonium hydroxide, and the pH was adjusted to 2.80 with phosphoric acid. The flow rate of the mobile phase was 1.0 mL/min, and the column temperature was set at 30℃. The detection wavelength was 254 nm. EDDS, fumaric acid, citric acid, malic acid and ethylenediaminetetraacetic acid (EDTA) were separated from one another within 8 min. EDDS showed good linearity in the range of 0.06-0.6 g/L. About 0.25 g/L EDDS was detected in the biosynthesis reaction solution catalyzed by recombinant EDDS-lyase, while 36.56 g/L malic acid was formed as the by-product from fumaric acid. The catalytic activity of the enzyme was confirmed in the hydrolysis of 10 g/L EDDS, which produced 3.05 g/L malic acid in 3 h. This analytical method is simple, rapid, sensitive, reliable, and suitable for the analysis in the research of EDDS bioconversion process.
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| http://dx.doi.org/10.3724/SP.J.1123.2019.03033 | DOI Listing |
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