A simple automated micromethod for measuring serum copper.

Area of Science:

• Clinical Chemistry
• Analytical Chemistry
• Biochemistry

Background:

• Accurate measurement of serum copper is crucial for diagnosing various medical conditions.
• Existing manual methods can be time-consuming and require larger sample volumes.
• Development of automated, sensitive, and precise analytical techniques is essential for clinical laboratories.

Purpose of the Study:

• To develop and validate an automated micromethod for quantifying serum copper concentration.
• To assess the reliability, accuracy, and efficiency of the new automated method.
• To establish reference ranges for serum copper in healthy adult males and females.

Main Methods:

• An automated micromethod utilizing formaldehyde-oxalydihydrazide as a chromogen and a Technicon Auto-Analyzer was developed.
• The method requires a small serum sample volume (0.2 ml).
• Validation included assessment of baseline stability, coefficient of variation, analyte recovery, and correlation with a manual method.

Main Results:

• The automated micromethod demonstrated a stable, noise-free baseline.
• The coefficient of variation was 2.4%, and analyte recovery was 102%.
• A strong correlation (r = 0.929, P < 0.001) was observed with a manual method when using copper standards in 0.277 M glucose. Mean serum copper levels were 94.1 mug/dl for males and 109.8 mug/dl for females.

Conclusions:

• The automated micromethod offers a precise and reliable approach for serum copper determination.
• This method is suitable for routine clinical laboratory use due to its efficiency and minimal sample requirement.
• Statistically significant differences in serum copper levels were observed between adult males and females.