指某一品种宝玉石特有的吸收光谱。但是，同一种宝石的不同样品，其特征谱线或谱带的出现频率或清晰度并不相同，其特征吸收光谱的可信度也就不同。
本文用紫外吸收光谱法和凝胶过滤——原子吸收光谱法研究了明胶钙结合配体的特征。
In present article the feature of ligands combined with gelatin -calcium is studied by UV spectrometry and gel filter-AAS method.
结果表明，紫甘蓝色素的吸收光谱为花色苷的特征吸收。
The results showed that absorption spectrum of violet cabbage pigment is distinction of anthocyanins.
纳米复合材料的红外，紫外-可见吸收光谱和DRS测试表明复合材料具有与基体材料不一样的光谱特征。
There were some difference in spectrum of IR, UV-Vis and DRS between the composite materials and polycarbonate .
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