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1.
Article in Chinese | WPRIM | ID: wpr-338202

ABSTRACT

The results of a toxicity analysis showed differences from those of the existing experimental data. Therefore, HPLC-ICP-MS was used to analyze the soluble arsenic content at different valences in realgar prepared with water grind processing, which were collected from 3 companies. The results showed that the free arsenic of the 3 companies did not exceed the limit of Chinese Pharmacopoeia. However, if the free arsenic was calculated based on the total value of As(Ⅲ) + As(Ⅴ), free arsenic of 1 company exceeded the limit of Chinese Pharmacopoeia. The method of determining free arsenic in Chinese Pharmacopoeia. was ancient Cai's arsenic detection method, which had a certain limitation and failed to effectively avoid the toxicity of remaining arsenics except for trivalent arsenic. Then, we examined the effects of water and temperature on the content and form of soluble arsenic in realgar. The results showed that the content of soluble arsenic increased with the rise of water content, and the form of soluble arsenic did not change, there were only As (Ⅲ) and As (Ⅴ); With the simple temperature factor, there was an increasing trend in the content of soluble arsenic in the samples, the maximum increment was As (Ⅲ) 2.489 mg•g⁻¹ and As (Ⅴ) 0.546 mg•g⁻¹; When water and temperature played an synergistic effect, the increase of soluble arsenic in the samples significantly changed, the maximum increment was As (Ⅲ) 23.690 mg•g⁻¹, As (Ⅴ) 0.468 mg•g⁻¹, respectively. Through comprehensive analysis, we believed that the quality of realgar was susceptible to water content and temperature. Both of the single effect of water content and the synergistic effect of water and temperature can significantly change the content of soluble arsenic in realgar, and the water content was a high-risk factor. In the current Chinese Pharmacopoeia 2015 version, the free arsenic detection method had limitations, hence new techniques shall be introduced; At the same time, realgar does not have a water content inspection item in the current pharmacopoeia, which shall be added. However, due to the limit of water content, more in-depth studies are required.

2.
Chinese Pharmaceutical Journal ; (24): 2045-2047, 2014.
Article in Chinese | WPRIM | ID: wpr-860139

ABSTRACT

OBJECTIVE: To investigate the influence of extracting methods on the content of soluble arsenic in Chinese traditional patent medicine containing realgar. METHODS: Soluble arsenic in traditional Chinese medicines niuhuang xiaoyan tablets was determined by atomic fluorescence spectrometry. The impact of several factors on the determination result was discussed, such as extraction solvents, extraction methods, extraction time, compound extraction and purification method. Then methodological study on the optimized method was carried out. RESULTS: Samples from 14 different manufactures were extracted with simulated intestinal fluid for 24 h at 37°C and the contents of soluble arsenic were between 200 and 1353 mg · kg-1. CONCLUSION: The proposed method is simple, sensitive and accurate, and can provide reference for the quality assessment of TCM products containing realgar.

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