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川芎嗪又称四甲基吡嗪,存在于川芎、当归等中药材中,具有理气、化瘀、活血的功效,临床上用于心脑血管、呼吸系统等疾病的治疗,适用于冠心病、脉管炎、心绞痛、脑血栓、缺血性脑血管病等[1-3]。建立血浆中川芎嗪的检测方法,对深入研究川芎嗪在生物体内的作用及作用机制具有重要意义。
目前,川芎嗪的分析方法主要包括高效液相色谱法[4-6]和色谱质谱联用法[7-8],其中液相色谱质谱联用法虽然检测灵敏度高,但设备昂贵、检测成本较高,高效液相色谱法一般使用紫外检测器或二极管阵列检测器,检测成本较低,但检测灵敏度较色谱质谱联用法低。为了提高高效液相色谱法的检测灵敏度,通常使用固相萃取技术对样品进行浓缩、净化[9-10]。纳米纤维固相萃取技术是一种以电纺纳米纤维为吸附材料的固相萃取技术[11],与传统的固相萃取技术相比,纳米纤维作为吸附剂具有更大的比表面积,能更有效地吸附目标物,因此,少量的纳米纤维就能达到很好的吸附效果,同时具有样品量、洗脱剂用量和有机溶剂用量少等优势。目前纳米纤维固相萃取技术已经在食品中有害物质检测、环境中有害物质检测、生物样品中生物标志物以及药物检测等分析领域中成功应用[12-20]。生物样品一般样品量较少,使用纳米纤维固相萃取技术,将有效提高目标物的提取效率,同时能有效提高目标物的浓缩倍数,提高检测灵敏度。本研究建立基于纳米纤维固相萃取技术的人血浆中川芎嗪的高效液相色谱检测方法。现作报道。
纳米纤维固相萃取高效液相色谱法测定人血浆中川芎嗪含量
Determination of ligustrazine in human plasma using nanofiber-packed solid-phase extraction-high performance liquid chromatography
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摘要:
目的建立纳米纤维固相萃取高效液相色谱法检测人血浆中川芎嗪含量。 方法样品经1%氨水稀释3倍,用活化后的PCAX型复合阴离子交换纳米纤维固相萃取柱净化富集,用去离子水淋洗,以50 μL甲醇洗脱,取20 μL进样检测。以甲醇1%冰醋酸水溶液(45:55,V/V)为流动相在岛津ODS-2色谱柱(250 mm×4.6 mm,5 μm)上进行分离,流速1.0 mL/min,检测波长295 nm。 结果该方法的线性范围为0.01~2.00 μg/mL,检出限为0.003 μg/mL,回收率为94.88%~103.11%,相对标准偏差为2.6%~4.3%。 结论该方法操作简单,具有样品需要量少、灵敏度高等优点,可用于人血浆中川芎嗪的含量测定。 Abstract:ObjectiveTo establish a nanofiber-packed solid-phase extraction-high performance liquid chromatography to determine the serum level of ligustrazine. MethodsThe sample was diluted by 1% ammonia solution for 3 times, purified and enriched with activated PCAX composite anion exchange nanofiber solid-phase extraction column, eluted with deionized water, eluted with 50 μL methanol, and 20 μL sample was detected.The methanol-1% acetic acid solution(45:55, V/V) was used as mobile phase for separation on Shimazu ODS-2 column(250 mm×4.6 mm, 5 μm) with flow rate for 1.0 mL/min and detection wavelength for 295 nm. ResultsThe linear range of this method was from 0.01 to 2.00 μg/mL, the detection limit was 0.003 μg/mL, the recovery rate was from 94.88% to 103.11%, and the relative standard deviations was from 2.6% to 4.3%. ConclusionsThe method has the advantages of simple operation, low sample requirement and high sensitivity, and can be used to determine the content of ligustrazine in human plasma. -
Key words:
- ligustrazine /
- high performance liquid chromatography /
- nanofiber /
- solid-phase extraction /
- plasma
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表 1 人血浆中川芎嗪的加标回收率与精密度(n=5)
加标量/μg 回收率/% RSD/% 0.1 103.11±3.29 3.2 0.4 94.88±2.51 2.6 1.0 98.19±4.22 4.3 -
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