A higher temperature in the atomizer would be a benefit in atomic absorption. be

Question

A higher temperature in the atomizer would be a benefit in atomic absorption. be a benefit in atomic emission. have negative effect on both atomic absorption and atomic emission. A sample containing an unknown concentration of Ca^2+ gave an absorbance of 0.250 in atomic absorption. "Spiking" the sample with enough Ca^2+ to increase the concentration by 0.200 M, without significantly diluting the sample, gave an absorbance of 0.450. The concentration of Ca^2+ in the original sample was 0.111 molar. 0.077 molar. 0.250 molar. Doppler broadening is due to movement of atoms toward and away from the source. collisions between atoms in the flame. increasing line width of the incident light. Hollow cathode lamps are used for atomic absorption and ICP-MS. apply a high voltage between anode and cathode in an evacuated lamp. differ for each element studied. The general types of atomic spectroscopy are absorption, flame, and emission. absorption phosphorescence, and emission. absorption, fluorescence, and emission.

Explanation / Answer

7. A higher temerature in the atomizer would,

(a) be a benefit in atomic absorption

8. let concentration of unknown is Cx

Cx/(Cx + 0.2) = 0.250/0.450

0.450Cx = 0.250Cx + 0.05

Cx = 0.05/(0.450 - 0.250)

(c) 0.250 molar

9. Doppler broadening is due to

(a) movement of atoms towards and away from the source

10. Hollow cathode lamps

(a) are used for atomic absorption and ICP-MS

11. General type of atomic spectroscopy arem

(a) absorption, flame and emission

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