在离子化合物中，正、负离子的比例严格遵守化学公式定义的化合价关系。

For ionic compounds, the state of having exactly the ratio of cations to anions specified by the chemical formula.

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通过改变流动相的流速和比例改变离子源中反应离子的种类和数量，研究离子化环境对蒽醌类化合物电离方式的影响。

Effects of ionization environment, including reaction ions type and amounts in APCI source, on ionization mode of anthraquinones were examined by changing the flow rate and mobile phase proportion.

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