English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

A novel electrode was successfully made by modifying a glassy carbon electrode (GCE) with a chitosan (CS)/carboxylated multi-walled carbon nanotube (CMWNT) composite. The electrochemical behavior of L-tyrosine (L-Tyr) and nitrite (NO2 ) was investigated using cyclic voltammetry, and the detection conditions of L-Tyr and NO2 were explored. The effective area of the CS/CMWNTs/GCE was calculated to be 7.2534 × 10 -6 cm 2 . The surface area of the electrode membrane surface increased significantly. Accelerating the electron transfer of K3[Fe(CN)6] is beneficial for the adsorption and enrichment of the measured substance. The results showed that the amperometric response of the sensor reached a maximum when the pH of phosphate-buffered saline (PBS) was 3.6 and 4.7 for L-Tyr and NO2 , respectively. The modified electrode could detect L-Tyr and NO2 in the linear concentration ranges of 1.0 × 10 -8 –2.0 M and 1.5 × 10 -8 –0.3 M, respectively. The detection limits were 1.6 × 10 -9 M and 2.1 × 10 -9 for L-Tyr and NO2 , respectively (S/N = 3). These results demonstrate the high stability and reproducibility of detection, obtained using the CS/CMWNTs/GCE. The modified electrode was applied to determine the L-Tyr content of amino acid injections and the NO2 content of salted radish.

Electrochemical Determination of Tyrosine and Nitrite Using CS/CMWNTs/GCE-modified Electrode