The purity of anthraquinone (AQ) can be determined by the following methods:
Melting point determination method: the melting point of anthraquinone is 197-201°C, its purity can be preliminarily judged by melting point determination. The anthraquinone sample is heated to the melting point, and the range of the melting point and the deviation of the melting point from the standard melting point are observed to judge the purity of the anthraquinone sample.
UV-Visible Absorption Spectroscopy: Anthraquinone has obvious absorption peaks in the UV-Visible spectrum range, and the purity of the sample can be evaluated by measuring the UV-Visible absorption spectrum of anthraquinone samples and comparing them with the spectra of standard products .
Effective liquid chromatography (HPLC): HPLC can effectively, accurately and quickly separate and purify samples. The purity of the sample was evaluated by measuring the HPLC spectrum of the anthraquinone sample and comparing it with the standard.
Specific rotation method: the specific rotation of anthraquinone is -173°, and the purity of the sample can be evaluated by measuring the specific rotation of anthraquinone samples and comparing them with standards.
NBCHAO reminds you: Different purity determination methods have their applicable scope and conditions, which need to be selected and determined in combination with the actual situation and needs. When performing a purity determination, it is also important to pay attention to sample preparation and handling, as well as the precision and accuracy of the experimental procedure, to ensure reliable and accurate results.
