Simple and sensitive detection method for diprophylline using glutathione-capped CdTe quantum dots as fluorescence probes

A New pH-Dependent Macrocyclic Rhodamine B-Based Fluorescent Probe for Copper Detection in White Wine

“…When the signal-to-noise ratio is equal to three, it is generally accepted for estimating LOD [41]. The LOD is calculated by multiplying the standard deviation of the y-intercepts of regression lines by 3 and then dividing the obtained value by the slope of the calibration curve [41,42]. The LOD for the detection of copper (II) ions obtained is 4.38 × 10 –8 M. This result indicates that Probe 3 is highly sensitive to the detection of copper (II) ions.…”

Molecularly imprinted polymers as the extracted sorbents of clenbuterol ahead of liquid chromatographic determination

“…However, these two classic methods have timeconsuming cleanup steps and require large quantities of toxic organic solvents in order to obtain a homogeneous liquid phase containing an analyte of interest. There are many newly developed pre-treatment methods of β 2 -agonists CLEN determination, including molecularly imprinted matrix solid-phase dispersion (MI-MSPD) coupled with high performance liquid chromatography (HPLC) ultraviolet detection (Qiao and Du, 2013), surface molecularly imprinted polymer (MIP) and micro-extraction in a packed syringe (SMIP-MEPS) (Du et al, 2014), MSPD and molecularly imprinted SPE (MISPE) (Huy et al, 2014), and MIP-capped cadmium telluride (CdTe) quantum dots (Qian et al, 2006;Huy et al, 2014;Ying et al, 2014). However, although there are many different procedures each claiming its own benefits, there is still a strong need for a simpler, effective, and efficient method for the extraction of the trace amount of analyte in complex mixtures.…”

A sensitive phosphorescence method based on MPA-capped Mn-doped ZnS quantum dots for the detection of diprophyllin

“…The conventional methods for DPP detection mainly include titration, 1-3 spectrophotometry, [3][4][5] polarography, 6 high-performance liquid chromatography (HPLC), [7][8][9][10] HPLC and chemometric assisted spectrophotometric methods 11 and the quantum dot fluorescence method. 12 However, there are some defects existing in these methods, such as the lack of specificity, long processing, high cost and potential interference from other factors, which have greatly limited their actual application. Therefore, a convenient, sensitive and rapid method for recognizing and detecting DPP is still highly demanded at present.…”