顶空气相色谱法同时测定黄蜀葵花总黄酮提取物中9种有机溶剂的残留量
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篇名: | 顶空气相色谱法同时测定黄蜀葵花总黄酮提取物中9种有机溶剂的残留量 |
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摘要: | 目的:建立同时测定黄蜀葵花总黄酮提取物中9种有机溶剂残留量的方法。方法:采用顶空气相色谱法测定黄蜀葵花总黄酮提取物中苯、丙烯腈、甲基丙烯酸甲酯、甲苯、1,2-二氯乙烷、二甲苯、氯苯、苯乙烯、二乙烯苯等9种残留溶剂的含量。色谱柱为Agilent DB-WAX毛细管柱(30 m×0.25 mm,0.25 μm),程序升温;氢焰离子化检测器温度为250 ℃,进样口温度为250 ℃;载气为氮气,流速为1.2 mL/min,分流比为10 ∶ 1;顶空进样量为1 mL,顶空平衡温度为90 ℃,平衡时间为45 min。结果:9种待测成分色谱峰之间的分离度均大于1.5,空白溶剂(10%N-甲基吡咯烷酮水溶液)无干扰;其检测质量浓度的线性范围分别为0.16~1.21、0.80~6.03、1.61~12.09、1.62~12.12、0.16~1.21、1.60~12.01、0.81~6.11、1.60~12.03、0.80~6.03 μg/mL(r≥0.999 4);定量限分别为0.162 08、0.201 08、0.080 6、0.080 768、0.161 92、0.400 36、0.040 712、0.026 736、0.013 395 μg/mL,检测限分别为0.040 52、0.040 216、0.026 87、0.026 9、0.040 48、0.080 072、0.013 57、0.008 912、0.004 465 μg/mL;精密度试验(n=5)、重复性试验(n=6)的RSD均小于5%;平均回收率为99.41%~111.27%(RSD<9%,n=9)。3批黄蜀葵花总黄酮提取物中试样品中均未检出上述9种残留溶剂。结论:所建立方法简便、准确、可靠,可用于黄蜀葵花总黄酮提取物中9种有机溶剂残留量的同时测定。 |
ABSTRACT: | OBJECTIVE: To establish a method for simultaneous determination of 9 kinds of organic solvents residues in total flavonoids extracts from Abelmoschus manihot. METHODS: Headspace GC was adopted to determine the contents of 9 kinds of organic solvents residues in total flavonoids extracts from A. manihot, such as benzene, acrylonitrile, methyl methacrylate, toluene, 1,2-dichloroethane, xylene, chlorobenzene, styrene and divinylbenzene. The determination was performed on Agilent DB-WAX capillary column (30 m×0.25 mm, 0.25 μm) through temperature-programmed route. The inlet temperature and FID detector temperature were set at 250 ℃. The carrier gas was nitrogen with the flow rate of 1.2 mL/min. The split ratio was 10 ∶ 1. The containers of headspace injector were in equilibrium at 90 ℃ for 45 min and the sample size was 1 mL. RESULTS: The separation degree among the peaks of 9 components was greater than 1.5, and the blank solvent (10% N-methyl pyrrolidone aqueous solution) had no interference. The linear ranges of them were 0.16-1.21, 0.80-6.03, 1.61-12.09,1.62-12.12, 0.16-1.21, 1.60-12.01, 0.81-6.11, 1.60-12.03, 0.80-6.03 μg/mL, respectively (r≥0.999 4). The limits of quantitation were 0.162 08, 0.201 08, 0.080 6, 0.080 768, 0.161 92, 0.400 36, 0.040 712, 0.026 736, 0.013 395 μg/mL; the limits of detection were 0.040 52, 0.040 216, 0.026 87, 0.026 9,0.040 48, 0.080 072, 0.013 57, 0.008 912, 0.004 465 μg/mL, respectively. RSDs of precision (n=5) and reproducibility (n=6) tests were all lower than 5%. Average recoveries were 99.41%-111.27%(RSD<9%, n=9). Above 9 residual solvents were not detected in 3 batches of total flavonoids extracts from A. manihot. CONCLUSIONS: Established method is simple, accurate and reliable, and can be applied for simultaneous detection of 9 kinds of organic solvents residues in total flavonoids extracts from A. manihot. |
期刊: | 2019年第30卷第14期 |
作者: | 张清华,张治云,杨海霞 |
AUTHORS: | ZHANG Qinghua,ZHANG Zhiyun,YANG Haixia |
关键字: | 黄蜀葵花总黄酮;顶空气相色谱法;残留溶剂 |
KEYWORDS: | Total flavonoids from Abelmoschus manihot; Headspace gas chromatography; Residual solvents |
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