Chinese Journal of Chromatography ›› 2021, Vol. 39 ›› Issue (6): 633-641.DOI: 10.3724/SP.J.1123.2020.09007
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XIONG Yue1,*(), WANG Cheng1, LIU Jianhui1, SHI Huihui1, WANG Yunhua1, SUN Yao1, YU Jie2
Received:
2020-11-04
Online:
2021-06-08
Published:
2021-04-13
Contact:
XIONG Yue
CLC Number:
XIONG Yue, WANG Cheng, LIU Jianhui, SHI Huihui, WANG Yunhua, SUN Yao, YU Jie. Confirmation of unknown additives in enrofloxacin powder[J]. Chinese Journal of Chromatography, 2021, 39(6): 633-641.
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URL: https://www.chrom-china.com/EN/10.3724/SP.J.1123.2020.09007
Analyte | Additive proportion | Purity angle | Purity threshold | Results of peak purity test | PDA matching angle | PDA matching threshold | Results of spectra similarity test |
---|---|---|---|---|---|---|---|
Acid test solution | - | 0.225 | 0.282 | All of purity angles are less than the threshold, which prove it is a peak of pure compound. | 0.435 | 1.158 | All of the PDA matching angles are less than the threshold, which prove its spectra is similar to the standard’s. |
Acid test solution-standard solution of menadione sodium bisulfite | 1∶4 | 0.084 | 0.287 | 0.091 | 1.158 | ||
1∶1 | 0.108 | 0.284 | 0.221 | 1.158 | |||
4∶1 | 0.228 | 0.297 | 0.328 | 1.158 |
Table 1 Results of peak purity test and spectral similarity test of unknown compound 1
Analyte | Additive proportion | Purity angle | Purity threshold | Results of peak purity test | PDA matching angle | PDA matching threshold | Results of spectra similarity test |
---|---|---|---|---|---|---|---|
Acid test solution | - | 0.225 | 0.282 | All of purity angles are less than the threshold, which prove it is a peak of pure compound. | 0.435 | 1.158 | All of the PDA matching angles are less than the threshold, which prove its spectra is similar to the standard’s. |
Acid test solution-standard solution of menadione sodium bisulfite | 1∶4 | 0.084 | 0.287 | 0.091 | 1.158 | ||
1∶1 | 0.108 | 0.284 | 0.221 | 1.158 | |||
4∶1 | 0.228 | 0.297 | 0.328 | 1.158 |
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