碘造影剂有两种形式：离子型和非离子型化合物。
Iodinated contrast comes in two forms: ionic and non-ionic compounds.
离子色谱法(IC)作为离子和离子型化合物的精密分析方法，其分析的准确性受样品预处理方法影响较大。
By the analysis method of the ion type compound, the IC's analytic accuracy prepared by sample to handle the method influence is big.
过渡金属氮化物是一类金属间充型化合物，兼具有共价化合物、离子晶体和过渡金属的性质。
Transition metal nitrides belong to a class of interstitial compounds, have the properties of covalence compound, ion crystal and transitional metals.
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