Which of the following statements is NOT correct with regard to chemical analysis by flame photometer?

Correct option is D

Explanation:
In flame photometry, when an ion returns from an excited state to its ground state, it actually emits radiation rather than absorbing it. This emitted radiation is at a characteristic frequency specific to the element, which allows for identification and quantification in the analysis. The other statements are accurate in describing the process of flame photometry: the intensity of the color correlates with the concentration of the element, and the wavelength of the emitted light identifies the element.
· Option (a) is correct as the intensity of color does indicate the concentration of the element.
· Option (b) is also correct because the wavelength corresponds to specific elements.
· Option (c) is true since ions indeed absorb energy from the flame to reach an excited state.
Information Booster:
· Flame photometry is a technique used to detect and measure the concentration of certain metal ions based on the color emitted when they are excited.
· The method is widely used for analyzing elements such as sodium, potassium, calcium, and lithium.
· Each metal ion has a unique emission spectrum, allowing for qualitative and quantitative analysis.
· The intensity of the flame color corresponds directly to the concentration of the element, following Beer-Lambert's law.
· The emission spectrum provides valuable information on both the identity and the amount of an element present in the sample.
· Understanding the principles of flame photometry is essential for accurate chemical analysis in various fields, including agriculture, environmental monitoring, and clinical diagnostics.
Additional Information:
· Option (a): Correct; the intensity of the color reflects the quantity of the element.
· Option (b): Correct; different elements emit light at different wavelengths.
· Option (c): Correct; ions absorb energy from the flame and become excited.
· Option (d): Incorrect, as ions emit radiation at characteristic frequencies when returning to the ground state, rather than absorbing it.