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Spectrophotometric flow-through gas sensor for the determination of atmospheric nitrogen dioxide[J] . D. Schepers,G. Schulze,W. Frenzel.Analytica Chimica Acta . 1995 (1)
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Simultaneous flow injection determination of nitrate and nitrite in water by gas-phase chemiluminescence[J] . Toyoaki Aoki,Muneki Wakabayashi.Analytica Chimica Acta . 1995 (1)