SERS detection of anthraquinone dyes: Using solvothermal silver colloid as the substrate

Suitability study of Ag nanosheet SERS substrates as a screening method for imidacloprid after QuEChERS extraction

“…The relative standard deviation (RSD) is calculated for the spectra obtained at ten different points on the AgNS platform to quantify the point-to-point reproducibility. The resulting statistical evaluations showed an RSD value of 6.66% for the signal found at 1414 cm À1 and 3.58% for the sign at 1610 cm À1 , which suggests that the platform has good performance and homogeneity given that the RSD value is below 15.00%, a value that is indicative of good reproducibility of the substrates as indicated by other studies, [52][53][54] for example, Li determines the reproducibility of the substrate with %RSD values of 12.96 and 11.69%. The authors point out that the reproducibility is reasonable to guarantee the practical application of the substrate.…”

Collaborative estimation of heavy metal stress in wheat seedlings based on LIBS-Raman spectroscopy coupled with machine learning

“…It has been shown that Ag colloids could significantly enhance the Raman spectral signal. 39 According to the Lee–Meisel procedure, 40 we used trisodium citrate (TSC, C 6 H 5 Na 3 O 7 ·2H 2 O 99.0%) as the reducing agent for the reduction of silver nitrate (AgNO 3 -99.8–100%) to prepare silver colloids. The chemical reaction equation is shown in eqn (1):C 6 H 5 Na 3 O 7 ·2H 2 O + 4Ag + = C 6 H 5 O 7 H 3 + 4Ag + 3Na + + O 2 ↑…”

“…Moreover, this research employed Ag colloids for the amplication of Raman signals and a dual-pulse to enhance LIBS signals. 39 According to the Lee-Meisel procedure, 40 we used trisodium citrate (TSC, C 6 H 5 Na 3 O 7 $2H 2 O 99.0%) as the reducing agent for the reduction of silver nitrate (AgNO 3 -99.8-100%) to prepare silver colloids. The chemical reaction equation is shown in eqn (1):…”

Alizarin old and new: Extraction techniques for coloration, advances in detection methods for historical textiles and novel applications as a functional dye

“…In an intensive manner, analytical work on antique red fibres assisted scientists in discovering the components and biological sources of ancient red dyes in specific areas and periods. Considering the importance and rarity of cultural and archaeological artefacts, a plethora of innovative techniques has been developed to access the anthraquinone‐based red dyes in textile objects on small‐sized fibre samples, for instance, fibre‐optics reflectance spectroscopy (FORS), 22,23 surface‐enhanced Raman spectroscopy (SERS) 2,24,25 and direct analysis in real‐time mass spectroscopy (DART‐MS) 26,27 . Furthermore, because of the diversity of possible dye materials and the complexity of analogous chromophores, chromatographic analysis through a high‐performance liquid chromatography (HPLC) system coupled with befitting detectors is preferred as an advanced and reliable method for characterising historical red dyes because of its capacity to provide high‐resolution separation of the detected components and chromatographic profiles of the dyes 2,15,21,28 .…”