Quantitation of proteins by electroimmunoassay using a digitizer connected with a programmable calculator

Area of Science:

• Biochemistry
• Analytical Chemistry
• Immunology

Background:

• Quantifying protein concentrations is crucial in various biological and medical assays.
• Traditional methods for electroimmunoassay analysis can be time-consuming and prone to manual error.
• The Laurell rocket electroimmunoassay is a widely used technique for protein quantification.

Purpose of the Study:

• To develop and describe an automated system for reading and calculating protein concentrations from electroimmunoassays.
• To significantly improve the efficiency and speed of data processing in protein quantification.

Main Methods:

• Utilized a digitizer (Hewlett Packard) to read rocket heights from calibration and unknown samples.
• Employed a programmable calculator (HP 9830 A) for automated data transfer and analysis.
• Implemented a second-degree polynomial fit using the method of least squares to generate a calibration curve.
• Automated printing of results and sequence numbers using a printer (HP 9866 A).

Main Results:

• The automated system drastically reduces the time required for reading and calculating protein concentrations.
• Analysis of a plate with 5 calibration samples (duplicate) and 20 unknown samples was completed in under 2 minutes.
• Achieved a 10-15 fold increase in speed compared to manual interpolation using hand-drawn calibration curves.

Conclusions:

• The described automated system offers a substantial improvement in the efficiency of protein quantification via electroimmunoassay.
• This technology facilitates faster and more accurate determination of protein concentrations, benefiting research and clinical laboratories.
• The system streamlines the workflow from sample measurement to final result reporting.