Chem 155 Quiz 3 Review Topics

Chem 155 Quiz 3 Review Topics:2. Compare Ar-plasma and air-C 2 H 2 flames in the following categories:Qualitycircle correctElectron Ar-plasma has higher lower equal air-C 2 H 2 flame.densitye - density thanTemperature Ar-plasma is higher lower equal air-C 2 H 2 flame.temperature thanChemical Ar-plasma has higher lower equal air-C 2 H 2 flame.reactivityreactivity thanFormation of Ar-plasma is higher lower equal air-C 2 H 2 flame.oxideslikelihood thanAtomizationefficiencyAr-plasma is superior inferiorequal toair-C 2 H 2 flame.3. Compare inductively coupled plasma atomic emission spectrometry (ICP-AES)to flame atomic absorption spectroscopy (FAAS) in the following categories:Qualitycircle correctchoiceCost to buy / ICP-AES is higher, lower, FAASoperateequal cost thanSimultaneous ICP-AES is more, less, FAASMultielementdetectionequallycompetent thanDynamic Range ICP-AES has larger, smaller, FAASequal dynamicrange thanDetection Limit ICP-AES has higher, lower,equal detectionlimits thanFAAS4. Because of the mulit-element capability and atomization / temperature sensitivityof emission intensity, the following analytical method has proved highlysuccessful in ICP-AES:a. Standard addidions c. D2 background correctionb. Internal standards d. nonlinear calibration analysis5. Formation of oxides or molecular species in flame/plasma can be suppressedby:a. EDTA or other complexing agentsb. Addition of KCl to the matrixc. Addition of oxyanions such as sulfate or phosphate.d. Standard additions methods.6. Ionization of analyte atoms in flame/plasma can be suppressed by:a. EDTA or other complexing agentsb. Addition of KCl to the matrixc. Addition of oxyanions such as sulfate or phosphate.d. Internal standards methods.