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Determination
Prepare the spectrometer (5) for the determination and adjust to the wavelength given in the method for the individual trace element concerned.
Spray three times in succession the calibration solutions (7.2), and the test solution (6.2) and the blank solution (7.1), noting each result and flushing the instrument with distilled water between individual sprayings.
Construct the calibration curve by plotting the average spectrometer reading for each calibration solution (7.2) along the ordinate and the corresponding concentration of the element, expressed in μg per ml, along the abscissa.
From this curve, determine the concentrations of relevant trace element in the test solution xs (6.2) and in the blank solution xb (7.1), expressing these concentrations in μg per ml.
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