Determination of trace tin by solid substrate-room temperature phosphorimetry using sodium dodecyl sulfate as sensitizer

Abstract An accurate, rapid, simple, and novel technique was developed to determine simvastatin (SMV). In this research, a screen-printed electrode (SPE) was deposited with graphene oxide (GO) and sodium dodecyl sulfate (SDS), respectively. For the first time, the handmade modified SPE measured the SMV by differential pulse voltammetry (DPV) with high sensitivity and selectivity. The results of cyclic voltammetry indicated the oxidation irreversible process of SMV. Various parameters (pH, concentration, scan rate, support electrolyte) were performed to optimize the conditions for the determination of SMV. Under the optimum experiment condition of 0.1 M KNO3 as support electrolyte and pH 7.0, the linear range was achieved for SMV concentration from 1.8 to 36.6 µM with a limit of detection (LOD), and a limit of quantitation (LOQ) of 0.06 and 1.8 µM, respectively. The proposed method was successfully utilized to determine SMV in tablets and urine samples with a satisfactory recovery in the range of 96.2 to 103.3%.

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Determination of Sodium Dodecyl Sulfate by Means of Photometric Titration with o -Toluidine Blue Dye

Journal of Surfactants and Detergents ◽

10.1002/jsde.12052 ◽

2018 ◽

Vol 21 (5) ◽

pp. 751-756 ◽

Cited By ~ 1

Author(s):

Dorota Ziółkowska ◽

Jan Lamkiewicz ◽

Alexander Shyichuk

Keyword(s):

Sodium Dodecyl Sulfate ◽

Toluidine Blue ◽

Sodium Dodecyl ◽

Blue Dye ◽

Dodecyl Sulfate ◽

Photometric Titration ◽

Toluidine Blue Dye

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Inactivation of Prions by Acidic Sodium Dodecyl Sulfate

Journal of Virology ◽

10.1128/jvi.80.1.322-331.2006 ◽

2006 ◽

Vol 80 (1) ◽

pp. 322-331 ◽

Cited By ~ 85

Author(s):

David Peretz ◽

Surachai Supattapone ◽

Kurt Giles ◽

Julie Vergara ◽

Yevgeniy Freyman ◽

...

Keyword(s):

Stainless Steel ◽

Sodium Dodecyl Sulfate ◽

Room Temperature ◽

Sodium Dodecyl ◽

Weak Acid ◽

Surgical Instruments ◽

Steel Wires ◽

Dental Equipment ◽

Dodecyl Sulfate ◽

Jakob Disease

ABSTRACT Prompted by the discovery that prions become protease-sensitive after exposure to branched polyamine dendrimers in acetic acid (AcOH) (S. Supattapone, H. Wille, L. Uyechi, J. Safar, P. Tremblay, F. C. Szoka, F. E. Cohen, S. B. Prusiner, and M. R. Scott, J. Virol. 75:3453-3461, 2001), we investigated the inactivation of prions by sodium dodecyl sulfate (SDS) in weak acid. As judged by sensitivity to proteolytic digestion, the disease-causing prion protein (PrPSc) was denatured at room temperature by SDS at pH values of ≤4.5 or ≥10. Exposure of Sc237 prions in Syrian hamster brain homogenates to 1% SDS and 0.5% AcOH at room temperature resulted in a reduction of prion titer by a factor of ca. 107; however, all of the bioassay hamsters eventually developed prion disease. When various concentrations of SDS and AcOH were tested, the duration and temperature of exposure acted synergistically to inactivate both hamster Sc237 prions and human sporadic Creutzfeldt-Jakob disease (sCJD) prions. The inactivation of prions in brain homogenates and those bound to stainless steel wires was evaluated by using bioassays in transgenic mice. sCJD prions were more than 100,000 times more resistant to inactivation than Sc237 prions, demonstrating that inactivation procedures validated on rodent prions cannot be extrapolated to inactivation of human prions. Some procedures that significantly reduced prion titers in brain homogenates had a limited effect on prions bound to the surface of stainless steel wires. Using acidic SDS combined with autoclaving for 15 min, human sCJD prions bound to stainless steel wires were eliminated. Our findings form the basis for a noncorrosive system that is suitable for inactivating prions on surgical instruments, as well as on other medical and dental equipment.

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