Bruce is analyzing samples of seawater to measure copper using AAS. The high salt content of the sample matrix is affecting the measurements. What can he do to ensure that the analysis is accurate? Oa Use the method of standard additions, spike a set of samples with known amounts of Copper and extapolate where the calibration curve crosses the x-axis to get the correct value. Ob Rotate the burmer head so that it is perpendicular to the light from the hollow cathode lamp. Oc. Tum down the heat for the air-acetylene flame. Od Use serial dilutions, successively dilute the sample in deionized water. OeUse a different wavelength for analysis.

The basic principles of AAS can be expressed as follows. Firstly, all atoms or ions can absorb light at specific, unique wavelengths. When a sample containing copper (Cu) and nickel (Ni), for example, is exposed to light at the characteristic wavelength of Cu, then only the Cu atoms or ions will absorb this light.

Atomic absorption spectrometry (AAS) detects elements in either liquid or solid samples through the application of characteristic wavelengths of electromagnetic radiation from a light source. Individual elements will absorb wavelengths differently, and these absorbances are measured against standards.