張斌,李曉如,梁逸曾
(1. 中南大學(xué) 化學(xué)化工學(xué)院,湖南 長(zhǎng)沙,410083;2. 長(zhǎng)沙環(huán)境保護(hù)職業(yè)技術(shù)學(xué)院,湖南 長(zhǎng)沙,410004)
鼎藥方枳白黃的GC-MS測(cè)定和交互移動(dòng)窗口因子法分析
張斌1, 2,李曉如1,梁逸曾1
(1. 中南大學(xué) 化學(xué)化工學(xué)院,湖南 長(zhǎng)沙,410083;2. 長(zhǎng)沙環(huán)境保護(hù)職業(yè)技術(shù)學(xué)院,湖南 長(zhǎng)沙,410004)
鼎藥方是僅含3個(gè)單味藥的方劑,是藥對(duì)方基礎(chǔ)上的又一種復(fù)方基本形式,比藥對(duì)能更好地揭示復(fù)方的配伍機(jī)制,采用GC-MS法分離測(cè)定鼎藥方枳白黃(FA-AM-RS)、單味藥枳殼(FA)、白術(shù)(AM)和黃芩(RS)的揮發(fā)油成分,結(jié)合交互移動(dòng)窗口因子法(AMWFA)對(duì)其共有組分進(jìn)行比較分析, 得到鼎藥方及其3個(gè)單味藥的純色譜曲線和質(zhì)譜圖;用質(zhì)譜庫(kù)結(jié)合保留指數(shù)進(jìn)行定性, 采用總體積積分法進(jìn)行定量。研究結(jié)果表明:鼎藥方枳白黃、單味藥枳殼、白術(shù)和黃芩分別定性出89,47,46和17種化學(xué)成分,分別占揮發(fā)油總體積的84.18%,92.64%,92.29% 和80.99%;鼎藥方與枳殼共有組分39個(gè),與白術(shù)共有組分37個(gè),與黃芩共有組分8個(gè),其揮發(fā)油組分主要來(lái)自于枳殼和白術(shù)。
鼎藥方;枳殼;白術(shù);黃芩;氣相色譜-質(zhì)譜(GC-MS);交互移動(dòng)窗口因子法(AMWFA)
鼎藥方是指僅含3個(gè)單味藥的方劑,是復(fù)方中除藥對(duì)方外最小的基本單位,是復(fù)方的又一種基本形式。對(duì)藥對(duì)方、鼎藥方的研究為中藥復(fù)方的配伍研究提供了最基本、最可靠的模式和依據(jù)[1]。多個(gè)單味藥的復(fù)方配伍關(guān)系非常復(fù)雜,給研究帶來(lái)極大困難,而目前人們對(duì)藥對(duì)方的研究欠全面。鼎藥方對(duì)復(fù)方化學(xué)成分的研究、中藥配伍規(guī)律的掌握及創(chuàng)制新的復(fù)方具有非常重要的現(xiàn)實(shí)意義[2-3]。鼎藥方枳白黃(由單味藥枳殼、白術(shù)和黃芩組成)是中藥燥濕利水的常用復(fù)方。枳殼( fructus aurantii )味苦、辛、酸,性溫,歸脾、胃經(jīng),為中醫(yī)常用理氣藥之一。白術(shù)(atractylodes macrocephala)味苦、甘,性溫,歸脾、胃經(jīng),中藥上常用于健脾益氣、燥濕利水[4]。黃芩(radix scutellariae)味苦、寒,清熱燥濕,瀉火解毒,涼血安胎。本文作者分別提取鼎藥方枳白黃及其單味藥的揮發(fā)性成分,利用GC-MS進(jìn)行分離檢測(cè),結(jié)合交互移動(dòng)窗口因子法(AMWFA)對(duì)其共有組分進(jìn)行比較分析,完成多組分復(fù)雜體系的解析,應(yīng)用質(zhì)譜庫(kù)相似度匹配和計(jì)算保留指數(shù)對(duì)各組分進(jìn)行定性,采用總體積積分法進(jìn)行定量[5-8],比較鼎藥方與單味藥的揮發(fā)油成分,分析配伍前后揮發(fā)油成分的變化。
1.1儀器和藥材
儀器為日本島津QP2010型氣相色譜儀-質(zhì)譜儀。藥材為:黃芩、白術(shù)、枳殼,均購(gòu)自九芝堂大藥房;正構(gòu)烷烴C8~C20和C21~C40(瑞士Fluka Chemika公司);正己烷(分析純)。
1.2揮發(fā)油提取
稱取干燥的鼎藥方(其中,黃芩75 g,白術(shù)75 g,枳殼75 g),按文獻(xiàn)[9]中的揮發(fā)油提取法提取。
1.3揮發(fā)油和正構(gòu)烷烴參照系的測(cè)定條件
色譜條件:色譜柱為 OV-I(長(zhǎng)度×內(nèi)徑為 30.00 m×0.25 mm)。升溫程序如下:起始溫度為40 ℃,以2 ℃/min升至120 ℃,再以10 ℃/min升至230 ℃,維持20 min。載氣為He,流速為1.0 mL/min,進(jìn)口溫度為250 ℃,界面溫度為280 ℃。質(zhì)譜條件:EI源電子能量為70 eV,離子源溫度為230 ℃,倍增電壓為1.28 kV,質(zhì)荷比m/z掃描范圍為20~600,掃描速率為3.8 次/s,溶劑延遲2 min。
1.4數(shù)據(jù)分析
數(shù)據(jù)分析在Gateway T8100計(jì)算機(jī)上進(jìn)行,程序用MATLAB 6.5編寫, 用NIST107質(zhì)譜庫(kù)進(jìn)行檢索。
2.1AMWFA原理
交互移動(dòng)窗口因子分析法(AMWFA法)[10]作為化學(xué)計(jì)量學(xué)的另一種分析二維數(shù)據(jù)的方法,其實(shí)質(zhì)是多組分光譜相關(guān)色譜法[11](MSCC)的拓展,目標(biāo)是對(duì) 2個(gè)體系中的2組二維數(shù)據(jù)片段進(jìn)行比較分析,最后得到2組二維數(shù)據(jù)片段中的共有組分定性結(jié)果。其方法為:先在一個(gè)體系中確定1個(gè)目標(biāo)矩陣A,再利用單點(diǎn)投影法在另一個(gè)體系中找到相關(guān)的基本矩陣B,利用矩陣A的信息對(duì)矩陣B進(jìn)行正交投影,從中提取兩者中共有光譜信息,即得到光譜相關(guān)色譜圖(MSCC)。反過(guò)來(lái),將B作為目標(biāo)矩陣,A作為基本矩陣進(jìn)行對(duì)比分析,得到反投影多組分光譜相關(guān)色譜圖(IP-MSCC)。
2.2AMWFA法對(duì)鼎藥方枳白黃與單昧藥白術(shù)揮發(fā)油共有組分的比較與分析
(3)第一次討論。分發(fā)病例資料,列出學(xué)習(xí)目的,指導(dǎo)學(xué)生利用圖書館、網(wǎng)絡(luò)等途徑查找資料,并進(jìn)行篩選整理。
圖1所示為枳殼、白術(shù)、黃芩和鼎藥方枳白黃揮發(fā)油的GC-MS總離子流圖譜(TIC)。選取白術(shù)TIC中的X峰簇(保留時(shí)間為51.692~52.300 min)和鼎藥方枳白黃TIC中的Y峰簇(保留時(shí)間為51.743~52.222 min)進(jìn)行解析。
根據(jù)方法原理,由AMWFA法獲得的多組分光譜相關(guān)色譜圖(MSCC)和反投影多組分光譜相關(guān)色譜圖(IP-MSCC)見圖2。由圖2可知:掃描點(diǎn)20~140區(qū)域內(nèi)曲線與橫坐標(biāo)幾乎平行,中間的凸起是噪聲引起,說(shuō)明X和Y峰簇互相包含于對(duì)方中,所含成分一致。圖3所示為共有秩分析結(jié)果,給出了2個(gè)體系中共有組分的關(guān)系:前3個(gè)擬合值幾乎為0,從第4個(gè)開始明顯增大,說(shuō)明X和Y 峰簇有3個(gè)共有組分。
下面獲取這 3個(gè)共有組分的純質(zhì)譜。按照AMWFA 法,在共有組分?jǐn)?shù)為1 的區(qū)域,可以從其特征向量中獲取對(duì)應(yīng)的純質(zhì)譜。以白術(shù)的色譜峰簇設(shè)為A矩陣,鼎藥方枳白黃的色譜峰簇設(shè)為B矩陣,以A矩陣的5~120區(qū)域?yàn)榛仃?,用移?dòng)窗口技術(shù)對(duì)B矩陣中的5~160區(qū)域進(jìn)行掃描(移動(dòng)窗口數(shù)為3),建立共有組分秩圖(圖4(a))及質(zhì)譜自相關(guān)曲線(圖4(b))。在共有組分秩圖中,有3個(gè)共有組分?jǐn)?shù)為 1 的區(qū)域,其對(duì)應(yīng)的質(zhì)譜自相關(guān)曲線也出現(xiàn) 3個(gè)平臺(tái)(見圖4(b)中R1,R2和R3)。可分別從這 3個(gè)平臺(tái)中任意1點(diǎn)提取出共有組分的純質(zhì)譜,即組分 1,2 和3的質(zhì)譜。鑒定出3個(gè)共有組分為 2-吡啶乙胺、乙酰丙酮-1,3-丁二烯和葉吡咯,其相似度分別為95.72%,94.45%和98.02%。圖5所示為解析后得到峰簇X和Y的色譜圖,其為1 個(gè)3組分重疊形成的峰簇。
圖1 枳殼、白術(shù)、黃芩和枳白黃揮發(fā)油的總離子圖譜Fig. 1 TICs of volatile oils of FA , AM, RS and FA-AM-RS
圖2 MSCC和 IP-MSCC分析結(jié)果Fig. 2 Results obtained by MSCC and IP-MSCC analysis
2.3保留指數(shù)
VANDEN 等[12]定義了程序升溫保留指數(shù):rt=100n+100[(tx-tn)/(tn+1-tn)]。式中:t為保留時(shí)間;x為待分析的化合物的碳原子數(shù);n和n+1分別為正構(gòu)烷烴的碳原子數(shù)。本文使用此公式計(jì)算程序升溫保留指數(shù)。
2.4揮發(fā)油組分的定量分析
2.5鼎藥方與單味藥之間揮發(fā)性成分的比較分析
由表1可見:鼎藥方枳白黃揮發(fā)油主要組分為D-苧烯(25.67%,質(zhì)量分?jǐn)?shù),下同),松油烯(2.75%),大根香葉烯 D(5.32%)和 1,2,3,4-四氫-1-丁基異喹啉(15.67%);枳殼揮發(fā)油主要組分為D-苧烯(23.90%),反-1,2-二(1-甲基乙烯基)-環(huán)丁烷(30.66%),γ-萜烯(11.37%)和 β-沉香醇(11.55%);白術(shù)揮發(fā)油主要組分為大根香葉烯 D(7.56%),α-衣蘭油烯(5.35%),1,2,3,4-四氫-1-丁基異喹啉(60.37%)和桉葉油醇(5.60%);黃芩揮發(fā)油的主要組分為乙酰苯(44.24%)、萘(4.96%)、十七烷(5.30%)和十三烷酸(10.47%);從揮發(fā)油組分?jǐn)?shù)及含量看,鼎藥方揮發(fā)油組分來(lái)自于單味藥枳殼和白術(shù),大約各占一半,黃芩的成分很少。單味藥中有些成分在鼎藥方中消失,同時(shí)鼎藥方中也有一些新成分產(chǎn)生,其原因可能在于合煎中發(fā)生了化學(xué)變化。
圖3 共有秩分析結(jié)果Fig. 3 Results of common rank analysis
圖4 共有組分解析結(jié)果Fig. 4 Resolution results of common components
表1 枳殼、白術(shù)、黃岑及其鼎藥方主要化學(xué)成分Table 1 Main chemical components of volatile oils in FA, AM, RS and FA-AM-RS
圖5 解析后的X峰簇和Y峰簇的色譜圖Fig. 5 Resolved chromatograms for X and Y peak clusters
1) 鼎藥方枳白黃、單味藥枳殼、白術(shù)和黃芩分別定性出89,47,46和17種組分,定性組分體積分別占鼎藥方枳白黃、枳殼、白術(shù)和黃芩揮發(fā)油總體積的84.18%,92.64 %,92.29%和80.99%。
2) 鼎藥方與單味藥枳殼共有的揮發(fā)油組分為 39個(gè),與單味藥白術(shù)共有的揮發(fā)油組分為37個(gè),與單味藥黃芩共有的揮發(fā)油組分為8個(gè)。
3) 鼎藥方揮發(fā)油組分主要來(lái)自于單味藥枳殼和白術(shù),大約各占一半,來(lái)自黃芩的揮發(fā)油組分很少,原因可能在合煎過(guò)程中發(fā)生了化學(xué)變化。
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(編輯 陳燦華)
Analysis of triherbal recipe fructus aurantii-atractylodes macrocephala-radix scutellariae by gaschromatography-mass spectrometry and alternative moving window factor
ZHANG Bin1, 2, LI Xiaoru1, LIANG Yizeng1
(1. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;2. College of Changsha Environmental Protection, Changsha 410004, China)
Considering that triherbal recipe is the prescription of three herbs and fundamental form of compound prescription that is used to study herbal-pair prescriptions, and it can more effectively reveal compatibility mechanism of compound prescription than herbal-pair prescriptions, the volatile components in triherbal recipe Fructus Aurantii-Atractylodes Macrocephala-Radix Scutellariae (FA-AM-RS) were analyzed, single herb FA and AM and RS were performed with two-dimensional gas chromatography-mass spectrometry (GC-MS) data coupled with alternative moving window factor analysis(AMWFA). The results show that, by means of these methods two-dimensional data, 89, 47, 46 and 13 volatile chemical components in essential oil of triherbal recipe FA-AM-RS, FA, AM and RS are determined qualitatively and quantitatively, accounting for 84.18%, 92.64%, 92.29% and 80.99% total contents of essential oil of triherbal recipe FA-AM-RS, FA, AM and RS, respectively. There are 39 common active constituents between triherbal recipe FA-AM-RS and single herb FA, and 37 common active constituents between FA-AM-RS and single herb AM, 8 common active constituents between FA-AM-RS and single herb RS. The major volatile chemical components in FA-AM-RS are mainly from that of single herbs FA and AM.
triherbal recipe; fructus aurantii; atractylodes macrocephala; radix scutellariae; gas chromatography-mass spectrometry (GC-MS); alternative moving window factor analysis (AMWFA)
O629.9
A
1672-7207(2016)04-1100-05
10.11817/j.issn.1672-7207.2016.04.003
2015-04-20;
2015-06-26
(Foundation item):國(guó)家自然科學(xué)基金資助項(xiàng)目(20175036,20235020)(Projects (20175036, 20235020) supported by the National Natural Science Foundation of China)
李曉如,教授,從事天然藥物化學(xué)研究;E-mail:xrli@csu.edu.cn