A direct DRS-FTIR probe for rapid detection and quantification of fluoroquinolone antibiotics in poultry egg-yolk

L-cysteine modified silver nanoparticles for selective and sensitive colorimetric detection of vitamin B1 in food and water samples

“…A good linearity was obtained in the range of 25-500 μg mL À1 vitamin B1 with a correlation coefficient (R 2 ) of 0.992, as shown in Figure 11B. The LOD was also determined by adding a minimum amount of vitamin B1 into the NPs solution and using three times the standard deviation with the slope of the curve (3SD/slope) [74,75]. LOQ is the lowest concentration of analyte at 10 Â SD by acceptable precision at the similar concentration, i.e., LOQ ¼ 10SD/slope [76].…”

A KBr-impregnated paper substrate as a sample probe for the enhanced ATR-FTIR signal strength of anionic and non-ionic surfactants in an aqueous medium

“…Spectral screening of surfactants using KBr-impregnated paper substrate: assignment of infrared peaks FTIR spectroscopy is a powerful, rapid and non-destructive technique that can detect analytes at a low concentration by considering the molecular vibrational bands in the midinfrared region. [29][30][31] FTIR minimizes the required time to obtain a spectrum to within a few seconds and the data acquired can be stored and manipulated. Here, a KBrimpregnated paper substrate was used as a sample probe for the analysis of model compounds such as LABS and SDBS for AS and Triton-X-100 for NS for analysis via FTIR spectroscopy.…”

Renewable 4-HIF/NaOH aerogel for efficient methylene blue removal via cation–π interaction induced electrostatic interaction

“…S7. † The broad band at 3422 cm À1 before sorption, assigned to N-H stretching vibrations, shied to 3403 cm À1 aer adsorption and the peak at 1632 cm À1 assigned to N-H bending vibration shied to 1596 cm À1 overlapped with the aromatic rings vibration of MB, 37,39 suggesting participation of the hydroxide anions in the adsorption process. (ii) Deprotonated -Ogroups at 4-position of indole allowed for the availability of a great number of adsorption sites for MB molecules adsorption via electrostatic attraction.…”