Determination of catecholamines based on the measurement of the metal nanoparticle-enhanced fluorescence of their terbium complexes

Advanced materials for optical sensing and biosensing of neurotransmitters

“…However, the optimum pH value is 9.0, which is from the biological pH of around 7.0, so it can be considered a drawback of this method. Also, the reaction time is long enough for rapid analysis of DA [84]. Using the method, the linear dynamic ranges for analysis of DA, epinephrine and norepinephrine were 2.4-140 nM, 2.5-110 nM, and 2.8-240 nM with LODs as low as 0.42 nM, 0.25 nM, and 0.64 nM, respectively.…”

Silver nanoparticles-enhanced rare earth co-luminescence effect of Tb(III)–Y(III)–dopamine system

“…[30], but a little higher than that reported in Ref. [31]. However, our method was conducted in a neutral buffer solution, which was close to the pH value of biological fluids.…”

“…The detection limit was 94 nM. Kim et al [31] developed a fluorescence method for determining DA by using AgNPs-enhanced fluorescence of Tb 3 þ in alkaline solution. In this work, a facile and sensitive method for the determination of DA was proposed based on Tb 3 þ -Y 3 þ -DA co-luminescence sensitized by AgNPs in neutral aqueous solution.…”

“…Therefore, the determination of DA concentration at trace levels in biological fluids such as urine, serum and pharmaceutical formulation is of great importance. Current analytical methods for the determination of DA mainly use electrochemistry [21][22][23][24][25], highperformance liquid chromatography (HPLC) [26,27], capillary electrophoresis (CE) [28,29], chemiluminescence (CL) [30], UV-visible absorption and fluorescence spectrophotometries [31][32][33][34][35][36][37]. The methods of HPLC and CE usually need derivatization separation process and is time-consuming.…”

Surface plasmon resonance sensor for norepinephrine using a monolayer of a calix[4]arene crown ether

“…Lots of methods had been developed, such as spectrophotometry [13,14], ion chromatography [15], fluorescence spectroscopy [16], gas chromatography [17], capillary electrophoresis [18], high performance liquid chromatography (HPLC) [19,20] and electrochemical assay [21][22][23][24]. Among them, electrochemical assay is more reliable and simple due to NE's electroactivity itself [3].…”