你可以要求给你的自来水做化学分析。

You can ask for a chemical analysis of your tap water.

《牛津词典》

产物经X射线衍射，水的等温吸附、差热分析、红外图谱，透射电镜以及化学分析等测定证实为L型沸石。

All the samples obtained were examined with X-ray diffraction, isothermal adsorption of water, DTA, TG, IR, TEM, and chemical analysis, and were identified as L-type molecular sieve.

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