A highly sensitive and selective assay of doxycycline by dualwavelength overlapping resonance Rayleigh scattering

Dual-channel optical sensing platform for detection of diminazene aceturate based on thioglycolic acid-wrapped cadmium telluride/cadmium sulfide quantum dots

“…It is clear that the RRS peaks are close to the absorption peak, which resulted in the enhancement of resonance scattering. According to previous studies reported, the increase of the volume of the molecule is also favorable to the enhancement of scattering intensity [23,30]. DA bound onto the surface of thioglycolic acid-wrapped CdTe/CdS Q-dots and caused the increase of the molecular volume, which was also conducive to the increase of RRS.…”

Methods for the separation, preconcentration, and determination of tetracycline antibiotics

“…Liquid extraction from solid matrices seems the most common method for the separation of tetracy clines from the solid samples of food products. This method is used for the extraction of tetracycline anti biotics from meat [15][16][17][18][19][20][21][22][23][24][25][26][27], fish [27][28][29][30][31], eggs [18,27,32], and honey [33][34][35][36][37][38][39], and it is performed as follows: A weighed portion of a thoroughly ground solid sam ple is placed in a vessel for agitation, and a selected sol vent is added; the contents are stirred for a specified time (from several minutes to several hours). The phases are separated by filtration.…”

“…Phosphate [16-18, 33, 38], citrate [19,29,33], hexamethylene tetramine [39], oxalate [20], and succinate [21,32] buffer solu tions and also the McIlvaine buffer solution [15,[34][35][36][37] are most frequently used as solvents. Furthermore, 5% trichloroacetic acid [23], a mixture of acetonitrile with a citrate buffer [28] and the McIlvaine buffer solution (60 : 40) [24,31], and the mixtures of metha nol with water (70 : 30) [30] and with 0.1 M succinic acid (50 : 50) [22,27] or acetonitrile are used [25,26]. For the intensification of sample preparation, liquid extraction from liquid and solid matrices is performed in an ultrasonic bath [19, 22-24, 29, 32, 38] for 5-30 min.…”

Determination of Sunset Yellow Based on Its Quenching Effect on the Fluorescence of Acridine Orange

“…[4][5][6] Currently, the use of such additives is drawing much attention due to a series of health risks induced by food colorants, because it plays an indispensible part in human public health. 7 Therefore, undoubtedly, the use of synthetic dyes in foodstuffs must be strictly controlled by legislation throughout the world and the detection of SY in a simple and sensitive manner is significant.…”