Determination of Tartrazine in Drugs

Modulation of plasmon transport between silver nanoparticles by a yellow fluorophore, tartrazine, is studied theoretically. The system is studied by combining a finite-difference time-domain Maxwell treatment of the electric field and the plasmons with a time-dependent parameterized method number 3 simulation of the tartrazine, resulting in an effective Maxwell∕Schrödinger (i.e., classical∕quantum) method. The modeled system has three linearly arranged small silver nanoparticles with a radius of 2 nm and a center-to-center separation of 4 nm; the molecule is centered between the second and third nanoparticles. We initiate an x-polarized current on the first nanoparticle and monitor the transmission through the system. The molecule rotates much of the x-polarized current into the y-direction and greatly reduces the overall transmission of x-polarized current.

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“…10 for an overlay of TDPM3-generated and experimentally generated spectra; experimental spectrum is taken from Ref. 19).…”

Section: Resultsmentioning

confidence: 99%

Modeling molecular effects on plasmon transport: Silver nanoparticles with tartrazine

Arntsen

Lopata

Wall

et al. 2011

The Journal of Chemical Physics

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“…Tartrazine, the major ingredient of the food coloring Yellow No. 5, is dark orange in color and is strongly absorptive at the wavelength of the trapping laser [24]. Therefore, in this work, tartrazine (Acros AC191891000) is ideal as the absorptive material.…”

Section: Experiments Setupmentioning

confidence: 99%

Loading an Optical Trap with Diamond Nanocrystals Containing Nitrogen-Vacancy Centers from a Surface

Hsu,

Ji,

Dutt

et al. 2015

Preprint

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We present a simple and effective method of loading particles into an optical trap in air at atmospheric pressure. Material which is highly absorptive at the trapping laser wavelength, such as tartrazine dye, is used as media to attach photoluminescent diamond nanocrystals. The mix is burnt into a cloud of air-borne particles as the material is swept near the trapping laser focus on a glass slide. Particles are then trapped with the laser used for burning or transferred to a second laser trap at a different wavelength. Evidence of successfully loading diamond nanocrystals into the trap presented includes high sensitivity of the photoluminecscence (PL) to an excitation laser at 520 nm wavelength and the PL spectra of the optically trapped particles. This method provides a convenient technique for the study of the nitrogen-vacancy (NV) centers contained in optically trapped diamond nanocrystals.

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“…For the purpose of quantification of the dye content in the pharmaceutical products and food, modern analytical methods and techniques are currently used, such as follows: high performance liquid chromatography (HPLC) [39,40,43,46,47,51,64,70,74], ion-pair liquid chromatography (IP-LC) [9,36], thin-layer chromatography (TLC) [5,49,63], spectrometry, derivative spectrometry, and spectrophotometric methods [7,57,62,68]. Electroanalytical methods also find its application in this field; mainly adsorptive voltammetry [1] and differential pulse polarography [8,12].…”

Section: Determination Of Dyes In Pharmaceuticalsmentioning

confidence: 99%