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Study of the Interactions of Palladium(Ii)-Ceftriaxone Chelate with Anionic Surfactants by Resonance Rayleigh Scattering (CAT#: STEM-ST-0055-YJL)

Introduction

Ceftriaxone (CTRX) is one of the long-efficient and broad-spectrum third generation cephalosporin antibiotics, which is widely used in the clinical at present. It has the strongest activity against gonorrhoeae and chlamydia trachomatis. Clinically, it is often used to treat respiratory tract infection, skin tissue infection, urinary tract infection, osteoarthritis infection and bacteroidal septicemia, and remarkable curative effects have been achieved. It has been used in the front line of treating gonorrhoea. To the study of the pharmacokinetics and recommendation of suitable dosage, it is significant to quantitatively determine the drug both in the pharmaceutical preparations and in body fluids. It is known that in the weak acid medium, Pd(II) can react with CTRX in the presence of sodium lauryl sulfonate (SLS) to form a chelate.




Principle

Resonance Rayleigh scattering (RRS) is similar to Rayleigh scattering in nature. Resonance Rayleigh scattering is a special elastic scattering produced when the wavelength of Rayleigh scattering (RS) is located at or close to its molecular absorption band. The key to generating RRS is: when the scattering is at or close to the absorption band of the scattering molecule, since the electron absorbs the electromagnetic wave at the same frequency as the scattering frequency, the electron strongly absorbs the photon energy due to resonance and re-scatters. Its scattering intensity is several orders of magnitude higher than that of pure Rayleigh scattering, and it no longer obeys the Rayleigh law of I∝λ-4. This absorption-rescattering process is called resonance Rayleigh scattering (RRS).

Applications

Resonance Rayleigh scattering is used to the study of aggregation of chromophores on biological macromolecules and the determination of biological macromolecules such as nucleic acid, proteins and heparin, further, it has been used in the determination of trace amounts of inorganic ions and the cationic surfactant by means of ion association reactions with some dyes. In addition, it has been applied to the study of nanoparticles in liquid and the determination of β-cyclodextrin inclusion constant and the critical micelle concentration of surfactant.

Procedure

1. Sample preparation
2. Measurement by scattering detection instrument
3. Data analysis

Materials

Rayleigh scattering measurement system
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