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1a) is x-ray spectrography or optical emission spectrography more suitable for trace analysis? b) which of the two methods cited in (a) has the more

1a) is x-ray spectrography or optical emission spectrography more suitable for trace analysis? b) which of the two methods cited in (a) has the more complicated spectra? c) which method cannot be used for element below atomic number 11? d) which method has the least amount of spestra overlapping?

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