Question

Holmium oxide can be used for this process in UV-Vis spectroscopy apparatuses. If a spectrometer appears to give poor results in this process, one can conduct a matrix spike experiment to “recover” the results. (-5[1])An example of this process involves adding aliquots of a known concentration (-5[1])to a sample and then extrapolating to find the negative x-intercept; that process is the method of (*) standard addition. This type of sensitivity divided by the standard deviation of a signal gives analytical sensitivity. In a Beer’s Law experiment, this process involves generating an absorbance-concentration curve for known standards, (10[1])which can then be used to interpolate an (10[1])unknown concentration based on its signal. For 10 points, (10[1])name this process of quantifying (-5[2])the relationship between analytical variables and validating the accuracy of an instrument. (10[2])■END■ (10[6]0[6])

ANSWER: calibration [accept calibration sensitivity; accept calibration curves; prompt on validation, reference, or standard until read; prompt on matrix effect corrections or bias corrections]
<JZ, Chemistry>
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