Sensitive Determination of Sulfate in Drinks and Vegetables Digests by Rayleigh Light Scattering Technique

Abstract

In this paper, a novel and sensitive method based on Rayleigh light scattering technique (RLS) was proposed for the determination of sulfate using a conventional spectrofluorometer. Sulfate was transformed to BaSO4 particles, which displayed intense light scattering in aqueous solutions. The effects of factors such as wavelength, acidity, stabilizers and interferents were studied in detail. The RLS intensity of the BaSO4 suspension was obtained in 0.1 mol L(-1) of [H+] and the addition of 2 mL of cationic polyacrylamide (CPAM) with 7.05 x 10(-3) mmol mL(-1) charged cations and 1.0 mL of BaCl2.2H2O (5.0%) at 510 nm. In the range of 8-400 microg mL(-1), RLS intensity was linear to the concentration of BaSO4, and the detection limit was 0.3 microg mL(-1). To determine the feasibility of the proposed method, some samples of water, drinks, and vegetables digests were analyzed, and the results were in agreement with the standard turbidimetric method. Good recovery results were also obtained in the range of 94-105%. Although this method was limited in stability, it was characterized with simplicity, sensitivity, reliability, and little interference.

A novel fluorescence and resonance Rayleigh scattering probe based on quantum dots for the detection of albendazole

“…[8][9][10][11][12][13][14] Since the resonance Rayleigh scattering (RRS) technique was rst introduced in 1993 by Pastemack et al, 15 it has gradually gained recognition from analytical chemists. [16][17][18] As a novel tool, RRS is characterised by high sensitivity, convenience in performance and simplicity in apparatus. It detects RRS signals with a common spectrouorometer and has been widely employed in the designation of bio-assemblies and aggregation species.…”

Using gold nanoparticles as probe for detection of salmeterol xinafoate by resonance Rayleigh light scattering

“…As a kind of elastic light scattering, RLS technique was proposed in 1993 by Pasternack et al [20], which was based on a common spectrofluorometer and had the characters of sensitivity, rapidity, simplicity, and easy operation. Since then, this technique became popular and has been used in various fields such as biochemistry [21,22], surfactants [23], food chemistry [24] and drug analysis [25][26][27][28]. To the best of our knowledge, the analysis of salmeterol xinafoate using AuNPs as probe by RLS has not been reported.…”