After white arsenic beingdissolved with hydrochloric acid, the content of Fein the solution isdetermined sensitively by airacetylene flame atomic absorption spectrometry.

砒霜试样用盐酸溶解，然后用空气乙炔火焰原子吸收光谱法直接测定其中铁的含量，对测定条件进行了优化。

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The White House also said it would conduct a study to look at the impact of placing limits on arsenic in drinking water.

CNN: Sci-Tech - Bush aides defend environmental record