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柱前衍生 HPLC/FLD-APCI/MS 法同时测定藏药悬钩木中 6 种三
萜酸类成分的含量 Δ
1,2*
1,2 #
马志良 ,赛桑杰 ,多 杰 (1.藏药新药开发国家重点实验室/青海省藏药新药开发重点实验室,西宁 810016;
1,2
2.青海省藏医药研究院,西宁 810016)
中图分类号 R284.1;R917 文献标志码 A 文章编号 1001-0408(2019)16-2243-05
DOI 10.6039/j.issn.1001-0408.2019.16.16
摘 要 目的:建立同时测定藏药悬钩木中山楂酸、科罗索酸、桦木酸、路路通酸、齐墩果酸、熊果酸等6种三萜酸类成分含量的方
法。方法:采用柱前衍生高效液相色谱-荧光检测/质谱联用法。选择2-(7H-二苯并[a,g]咔唑)乙基对甲苯磺酸酯为荧光衍生化试
剂。色谱柱为 Hypersil C18,流动相为 5%乙腈水溶液-乙腈(梯度洗脱),流速为 1.0 mL/min,荧光激发波长为 300 nm,发射波长为
395 nm,柱温为35 ℃,进样量为10 μL;采用大气压化学电离源、正离子模式,喷雾压力为60 psi,干燥气流量为9 L/min,干燥气温
度为350 ℃,气化温度为450 ℃,毛细管电压为3 500 V。结果:山楂酸、科罗索酸、桦木酸、路路通酸、齐墩果酸、熊果酸检测质量浓
度线性范围均为 0.025~6.4 μg/mL(r≥0.999 6);定量限分别为 5.11、4.78、4.42、4.22、4.29、4.51 ng/mL,检测限分别为 1.42、1.27、
1.30、1.28、1.16、1.22 ng/mL;精密度试验的RSD 均小于5%,稳定性、重复性试验的RSD均小于2%(路路通酸未检出);加样回收
率分别为 97.90%~100.55%(RSD=1.00%,n=6)、97.95%~102.95%(RSD=1.74%,n=6)、96.00%~101.20%(RSD=2.00%,n=
6)、93.25%~104.20%(RSD=4.25%,n=6)、92.20%~103.30%(RSD=3.58%,n=6)、97.80%~103.50%(RSD=2.03%,n=6)。
结论:该方法准确、可靠,专属性好,可用于同时测定藏药悬钩木中6种三萜酸类成分的含量。
关键词 悬钩木;三萜酸;山楂酸;科罗索酸;桦木酸;路路通酸;齐墩果酸;熊果酸;柱前衍生化;高效液相色谱-荧光检测/质谱联
用;含量测定
Content Determination of 6 Kinds of Triterpene Acid in Tibetan Medicine Rubus biflorus by Pre-column
Derivatization HPLC/FLD-APCI /MS
MA Zhiliang 1,2 ,SAI Sangjie 1,2 ,DUO Jie 1,2 (1. State Key Laboratory of Tibetan Medicine Research and
Development/Qinghai Province Key Laboratory of Tibetan Medicine Research and Development, Xining
810016,China;2. Qinghai Tibetan Medicine Research Institute,Xining 810016,China)
ABSTRACT OBJECTIVE:To establish the method for content determination of 6 kinds of triterpene acids such as haw acid,
corosolic acid,betula acid,betulonic acid,oleanolic acid and ursolic acid in Tibetan medicine Rubus biflorus. METHODS:
Pre-column devrivatization HPLC-FLD-APCI/MS method was adopted. 2-(7H-dibenzo[a,g]carbazol-7-yl) ethyl-4-methylbenzene-
sulfonate was used as the pre-column derivatization reagent.Hypersil C18 column was used with the mobile phase consisted of 5%
acetonitrile water solution-acetonitrile(gradient elution)at the flow rate of 1.0 mL/min. The excitation wavelength of fluorescence
was 300 nm and the emission wavelength was 395 nm. The column temperature was 35 ℃,and sample size was 10 μL. Under
atmospheric-pressure chemical ionization(APCI)source in positive-ion mode,pressure was 60 psi,the drying gas flow rate was 9
L/min,the dry gas temperature was 350 ℃,the gasification temperature was 450 ℃,and the capillary voltage was 3 500 V.
RESULTS:The linear range of haw acid,corosolic acid,betula acid,betulonic acid,oleanolic acid and ursolic acid were 0.025-6.4
μg/mL(r≥0.999 6). The quantitative limits were 5.11,4.78,4.42,4.22,4.29,4.51 ng/mL;and detection limits were 1.42,1.27,
1.30,1.28,1.16,1.22 ng/mL,respectively. RSD of precision test was less than 5%,stability and repeatability tests were all less
than 2%(no betulonic acid detected). The recovery rates were 97.90%-100.55%(RSD=1.00%,n=6),97.95%-102.95%(RSD=
1.74% ,n=6),96.00% -101.20%(RSD=2.00% ,n=6),93.25% -104.20%(RSD=4.25% ,n=6),92.20% -103.30%(RSD=
3.58% ,n=6),97.80% -103.50%(RSD=2.03% ,n=6),respectively. CONCLUSIONS:The method is accurate,reliable and
exclusive,and can be used for simultaneous determination of 6 kinds of triterpene acids in Tibetan medicine R. biflorus.
KEYWORDS Rubus biflorus;Triterpene acid;Haw acid;
Δ 基金项目:藏药新药开发国家重点实验室项目(No.2015DQ87-
Corosolic acid;Betula acid;Betulonic acid;Oleanolic acid;
0717);青海省科技计划项目(No.2017-ZJ-Y15)
Ursolic acid;Pre-column derivation;HPLC-FLD-APCI/MS;
*助理研究员。研究方向:藏药质量标准研究。电话:0971-
8271096。E-mail:mzl3205@126.com Content determination
# 通信作者:主任医师。研究方向:藏医药基础研究。电话:
0971-8271096。E-mail:duojie0302@sina.com
中国药房 2019年第30卷第16期 China Pharmacy 2019 Vol. 30 No. 16 ·2243 ·