Total protein determinations by particle beam/hollow cathode optical emission spectroscopy

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Biochemistry

Background:

• Accurate total protein determination is crucial in various scientific fields.
• Traditional methods often involve complex and time-consuming sample pretreatment.
• There is a need for faster, more sensitive, and simpler protein quantification techniques.

Purpose of the Study:

• To introduce a novel quantitative method for total protein determination.
• To utilize particle beam/hollow cathode optical emission spectroscopy (PB/HC-OES) for protein analysis.
• To explore the adaptation of this method for microfluidic systems.

Main Methods:

• Quantitative total protein determination using PB/HC-OES by monitoring carbon atomic emission.
• Parametric optimization of sample introduction, nebulization, desolvation, and hollow cathode source conditions.
• Analysis of aqueous bovine serum albumin solutions with and without matrix modifiers (HCl, KCl).

Main Results:

• Achieved single-nanogram level detection limits for bovine serum albumin.
• Demonstrated high sensitivity and low detection limits with the PB/HC-OES method.
• Observed significant sensitivity improvement with KCl addition, supporting a carrier effect.

Conclusions:

• The PB/HC-OES method offers an efficient, sensitive, and rapid approach for total protein quantification.
• The method simplifies sample handling by excluding labor-intensive pretreatment.
• The technique is adaptable for integration with microfluidic devices for future protein analysis.