In atomic absorption spectrophotometry, which pair of trace metals is typically measured?

In atomic absorption spectrophotometry, which pair of trace metals is typically measured?

• A. Sodium and Potassium
• B. Iron and Zinc
• C. Calcium and Magnesium
• D. Copper and Manganese

Answer: (C)

In atomic absorption spectrophotometry, you quantify metals by measuring how much light a sample’s free atoms absorb at wavelengths specific to each element; the absorbance increases with concentration, and you use standards to build a calibration curve. Calcium and magnesium are especially common targets because they are essential minerals that labs routinely analyze in biological samples and water, and their absorption lines fall at wavelengths and under flame conditions that are readily detectable with standard AAS setups. This makes calcium and magnesium straightforward, reliable measurements in many routine analyses, from clinical chemistry to environmental testing. Other pairs listed can be measured by AAS as well, but calcium and magnesium are the most routinely encountered combination for this technique in many settings.

In atomic absorption spectrophotometry, you quantify metals by measuring how much light a sample’s free atoms absorb at wavelengths specific to each element; the absorbance increases with concentration, and you use standards to build a calibration curve. Calcium and magnesium are especially common targets because they are essential minerals that labs routinely analyze in biological samples and water, and their absorption lines fall at wavelengths and under flame conditions that are readily detectable with standard AAS setups. This makes calcium and magnesium straightforward, reliable measurements in many routine analyses, from clinical chemistry to environmental testing. Other pairs listed can be measured by AAS as well, but calcium and magnesium are the most routinely encountered combination for this technique in many settings.