The detection limits of the method under optimized conditions were in the range of 0.02 0.05 ng mL−1.
In this work, an adhesive layer of polydopamine (PDA) coating was synthesized by a simple electrochemical cyclic voltammetry (CV) method under optimized conditions.
In this study, a mesoporous nickel sulfide (NiS) hierarchical framework was synthesized using a simple solvothermal method under optimized experimental conditions, including the amount of sulfur and experimental time, and characterized using a range of spectroscopic and microscopic techniques.
The proposed method under the optimized conditions was used to determine Trp and Tyr with linear ranges of 0.1 200.0 μM and 0.4 175.0 μM, detection limits of 0.04 μM and 0.10 μM (S/N = 3), respectively.
The method was evaluated under optimized extraction conditions (i.e., amount of sorbent, 138 mg; extraction time, 11 min; sample pH, pH of water (i.e., 5.5⬜6.5); eluent solvent volume, 0.5 mL; and elution time, 5 min), obtaining a linear response from 1 to 100 μg L↙1 for benzene; from 10too 100 μg L↙1 for toluene, ethylbenzene and o-xylene; and from 10to7575 μg L↙1 for m,p-xylene.
The analytical characteristics of the proposed method were constructed under optimized conditions.
Acquisition at full scan and SIM was performed at m/z = 338.5 corresponding to [M + H]+.> The proposed method was validated under optimized conditions.
The performance of the elaborated method was validated under optimized separation conditions (cf. Sect. " Parameters affecting the sensitivity enhancement") by calculation of respective coefficients, i.e., linearity, limit of detection (LOD), precision, and accuracy of the measurements.
For instance, a value of -10 indicates that the conventional method under-estimates accessibility by 10% in comparison with the optimized method.
The VAT method would seem the most straightforward to utilize in most field situations, and under optimized sampling constraints the method holds promise for row crops [ 14].
