Lan Ding's research while affiliated with Jilin University and other places

Publications (8)

Article
A facile one-pot hydrothermal approach for synthesizing water-dispersed nitrogen and sulfur doped carbon dots (NS-CDs) with high luminescence quantum yield was explored, using cysteine and tryptophan as precursors. The NS-CDs were characterized by means of FT-IR spectroscopy, XRD, TEM, etc. It was found that the absolute photoluminescence quantum y...
Article
A rapid analytical method was first developed to detect organophosphorus pesticides(OPPs) in cereals, which used dynamic microwave assisted extraction(DMAE) coupled online with a modified quick, easy, cheap, effective, rugged, and safe(QuEChERS) method. Cereals samples were mixed with a certain amount of quartz, C18 and primary second amine(PSA), a...
Article
Sample pretreatment is an important part for qualitative and quantitative analysis of targets in analytical chemistry. With the rapid development of adsorbents in material science, selective adsorbents have been found particularly practical in sample pretreatment due to their resistance to complex matrix interference. Selective adsorbents concern f...
Article
Molecularly imprinted polymers (MIPs), as artificially fabricated selective absorbents, have exhibited great potential for selective separation and enrichment of trace targets in complicated matrix. However, preparing MIPs for specific recognition in aqueous matrix often face enormous challenges, which greatly limit the wide application of MIPs for...
Article
Herein, we presented a facile preparation approach for multicolor emissive carbon dots (M-CDs) within 20 min by microwave irradiation. The M-CDs could emit tunable fluorescent emissions from violet to red without obviously compromising fluorescent intensities. Moreover, the M-CDs showed excellent solubility and stability in both water and common or...
Article
An environmentally friendly method for extracting sulfonamides(SAs) residues from animal feed was described and applied. The method used online microwave-assisted steam extraction coupled with solid phase extraction(MASE-SPE), which was followed by the analysis using high performance liquid chromatography-mass spectrometry(HPLC-MS/MS). The SAs resi...
Article
Full-text available
In the study, a simple and selective method based on magnetic separation technology is presented for the extraction of sulfonamides (SAs) from environmental water, followed by liquid chromatography–tandem mass spectrometry. In this method, magnetic surface molecularly imprinted polymers (Fe3O4@SiO2@MIPs) with super-paramagnetic property and high se...

Citations

... In recent years, more and more research teams have developed various assays with good performance for fabricating ECL immunosensors to detect AFB1 [13][14][15][16][17]. According the published works, the detection process could be roughly divided into three categories: signal enhancement [18], signal quenching [19], and signal masking [20]. ...
... Te current methods have introduced improvements to avoid the high consumption of solvents and long extraction steps. Several alternatives include matrix solid-phase dispersion (MSPD) [16]; dispersive liquid-liquid microextraction based on solidifcation of foating organic drop (DLLME-SFO) [17,18]; liquid-phase microextraction (LPME) [19]; microwave-assisted extraction (MAE) [20]; the quick, easy, cheap, efective, rugged, and safe (QuEChERS) method [21]; supercritical fuid extraction (SFE) [22]; solid-phase extraction (SPE) [23]; solidphase microextraction (SPME) [24,25]; and stir bar sorptive extraction (SBSE) [26]. Notably, extraction technique selection depends on the characteristics of the pesticide, the matrix, and the system availability. ...
... The solvent extraction technique developed for detection of ammonium ion in aqueous samples is affected by interferents from various cations already present in water [16]. The estimation of ammonium ion in rainwater samples has also been carried out by using a flow-injection chemiluminescence analysis technique [11,13,17,18]. A fluorometric technique coupled with ion chromatography to resolve the interferences by expanding the retention time has also been reported for assessment of ammonium ion [19]. ...
... The hydrophilic composition of the MIMs could effectively suppress the non-specific adsorption caused by hydrophobic interactions. This property is advantageous to the recognition of BPA in an aqueous environment [35]. The WCA of CF membranes before and after imprinting were measured. ...
... Carbon quantum dots (CQDs) are 0D sub-sphaeroidal nanophase materials [17]. Since it was discovered, the research on CQDs has obtained considerable attention because of its remarkable properties such as safety, good light absorption, ease of functionalization, chemical inertness, inexpensive, and easy synthesis compared to its 1D or 2D counterparts [18,19]. Although CQDs possess many advantages, the reports about photodetectors based on CQDs are still few [20,21]. ...
... The sensitivity was expressed by determining the limits of detection (LOD) and quantification (LOQ). The LOD and LOQ were defined as signal to noise (S/N) = 3 and 10 respectively [26,27], and were calculated after injection of standard samples with the lowest concentration that the GC-MS instrument could detect with acceptable response. Table 1 showed that LOD and LOQ ranged from 0.1 g to 0.4 g and from 0.4 g to 1.2 g for monosaccharide derivatives, respectively. ...
... However, the residual effects of these compounds have raised significant concerns. Long-term use of sulfonamides can cause side effects such as hematopoietic turbulence, allergies, and hypothyroidism [7,8]. ...