The accuracy can be optimized by strengthening quality control of critical factors in the process of test of ammonia density in indoor air with indophenol blue photometric method.
通过对室内空气中氨的靛酚蓝分光光度法检测的整个相关过程的影响因素进行质量控制，从而提高室内空气中氨浓度检测的准确性。
Infrared photometric method, the standard method to determine oil quality in China, is the only method which is not only qualitative but also quantitative.
红外光度法是目前中国测定油类的标准方法，也是唯一一种在对油测定中既能进行定性分析，又可以进行定量分析的方法。
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