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10 Cards in this Set
- Front
- Back
Briefly describe how each of the following methods of analysis are used to obtain ion concentrations that are relevant to a TDS measurement, and list some ions that are analyzed using each technique. i. Titrations: including each of the following: *Acid Base *Redox *precipitation *complex formation ii. Ion Chromatography (IC) iii. Atomic Absorption analysis (AA) iv Atomic emission analysis such as ICP. v. Potentiometric analysis (such as an ion selective electrode or ISE) |
Titrations: *Acid Base *Redox *precipitation *complex formation ii. Ion Chromatography (IC): iii. Atomic Absorption analysis (AA): iv Atomic emission analysis such as ICP: |
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Describe three methods used to obtain TDS along with the advantages and disadvantages of each method. |
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For light with a wavelength of 500 ηm, give the frequency and the energy per photon, and state whether the light is UV, visible, or infrared radiation. |
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Describe how molecules absorb waves in the microwave, IR, VIS or UV, and gamma ray regions of the spectrum. |
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Define T and %T in terms of the intensity of light entering and leaving a sample in a spectrophotometer, and then determine the value of A if I0 = 5*I. |
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Sketch a graph of %T vs concentration and A vs concentration, and state which one gives a linear Beer’s law graph. |
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Draw schematics showing the location of the light source, the sample and the detector for absorption, emission and scattering spectrophotometers. |
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Define analyte, blank solution and standard solution, and explain why analysis of iron using colorimetric analysis needs both a blank and a set of standards. |
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Give 4 advantages of ICP instruments, and explain what is meant by linear range. |
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sketch a graph with a calibration curve (conductivity vs mg NaCl for example) with 5 data points. Use the graph to show what is meant by each of the following: detection limit; linear range; interpolation, and extrapolation. |
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