# A Straightforward Method for Copper Determination in Fish Samples via Direct Solid Sample Analysis Line-Source GFAAS

## TL;DR

This paper introduces a simple and reliable method for measuring copper in fish samples using a direct solid sample analysis technique with a graphite furnace.

## Contribution

The novelty lies in using a direct solid sample analysis method with a homemade glass capillary device for copper determination in fish.

## Key findings

- The optimal pyrolysis and atomization temperatures were found to be 1100 °C and 2400 °C, respectively.
- The method achieved detection and quantification limits of 0.04 ng g–1 and 0.12 ng g–1 for copper in fish tissues.
- External calibration with aqueous solutions provided accurate copper quantification in fish samples.

## Abstract

This manuscript describes a simple and reliable method
for direct
solid sample analysis applied for Cu determination in powdered fish
samples using line-source graphite furnace atomic absorption spectrometry.
Direct solid sample analysis was performed using a laboratory-made
device based on glass capillary tubes for sample mass measurement
and transportation to the graphite furnace. The pyrolysis and atomization
temperatures were optimized; the optimum conditions were achieved
at 1100 °C (pyrolysis) and 2400 °C (atomization). External
calibration against aqueous solutions proved to be a reliable alternative
for Cu quantification in fish samples with good accuracy. The detection
and quantification limits for Cu determination in fish tissues were
0.04 ng g–1 and 0.12 ng g–1, respectively.
The proposed method revealed good sensitivity while being simple and
reliable.