聲光可調—近紅外漫反射光譜法快速評價黃芪藥材質量
發(fā)布時間:2019-08-30 來源: 日記大全 點擊:
中圖分類號 R978.7 文獻標志碼 A 文章編號 1001-0408(2018)02-0168-04
DOI 10.6039/j.issn.1001-0408.2018.02.06
摘 要 目的:建立快速評價黃芪藥材質量的方法。方法:采用烘干法測定黃芪藥材樣品水分含量,采用高效液相色譜(HPLC)-蒸發(fā)光散射檢測法(ELSD)測定黃芪甲苷的含量,采用HPLC法測定毛蕊異黃酮葡萄糖苷的含量(均作為參考值)。采用聲光可調-近紅外漫反射光譜法結合偏最小二乘法建立預測黃芪藥材中上述指標含量的定量模型(作為預測值)。根據參考值,采集60批藥材樣品,采用一階導數聯合平滑降噪法預處理光譜,水分、黃芪甲苷、毛蕊異黃酮葡萄糖苷含量預測的最佳波段分別為1 100~2 300、1 080~2 160、1 170~2 230 nm。結果:藥材樣品中水分、黃芪甲苷、毛蕊異黃酮葡萄糖苷的含量測定方法學考察符合要求。水分、黃芪甲苷、毛蕊異黃酮葡萄糖苷定量模型校正均方根偏差分別為0.132 3、0.006 6、0.002 5,預測均方根偏差分別為0.237 1、0.016 3、0.004 7,校正集內部交叉驗證相關系數分別為0.975 9、0.953 3、0.968 0;定量模型內部驗證偏差分別為1.43%、1.90%、1.84%,外部驗證偏差分別為1.73%、2.68%、2.71%。結論:該方法快速、準確、簡便、無污染,可用于黃芪藥材質量的快速評價。
關鍵詞 近紅外漫反射光譜法;聲光可調;黃芪;水分;黃芪甲苷;毛蕊異黃酮葡萄糖苷
ABSTRACT OBJECTIVE: To establish the method for rapid quality evaluation of Astragali Radix. METHODS: The moisture of medicinal material was determined by oven drying method; the content of astragaloside Ⅳ was determined by HPLC-ELSD; the content of isoflavone glucoside was determined by HPLC (as reference value). The partial least squares (PLS) method combined with acousto-optic turnable filter-NIDRS was adopted to build quantitative model of above indexes in Astragali Radix (as predict value). According to reference value, 60 batches of sample were collected. The spectra pretreatment was conducted by first derivative method combined with Savitzky golay. The optimal bands of moisture, astragaloside Ⅳ and isoflavone glucoside were 1 100- 2 300 nm,1 080-2 160 nm,1 170-2 230 nm,respectively. RESULTS: The content determination of moisture, astragaloside Ⅳ and isoflavone glucoside in samples were all in line with methodology requirements. The corrected mean square root deviation of quantitative model for moisture, astragaloside Ⅳ, calycosin glucoside were 0.132 3, 0.006 6, 0.002 5, respectively; predicted mean square root deviation were 0.237 1, 0.016 3, 0.004 7; internal cross validation coefficient of correction set were 0.975 9, 0.953 3, 0.968 0; internal verification deviation of quantitative model were 1.43%, 1.90%, 1.84%; external verification deviation were 1.73%, 2.68%, 2.71%, respectively. CONCLUSIONS: The method is rapid, accurate,simple,pollution-free, and can be used for rapid quality evaluation of Astragali Radix.
KEYWORDS NIDRS; Acousto-optic turnable filter; Astragali Radix; Moisture; Astragaloside Ⅳ; Isoflavone glucoside
中藥材在采購、驗收、入庫、投料過程中存在著質量檢測程序繁雜、費時長等問題,不能滿足大批量的現場快速分析要求。為解決該問題,有必要研發(fā)涵蓋水分、浸出物、特征性成分等不同檢測項目的快速檢測方法作為企業(yè)內部質量控制標準。
近紅外漫反射光譜法(NIR)作為一種快速分析方法,具有很多優(yōu)點,如快速、無損、環(huán)保,并可對固體、液體和氣體樣品直接進行測定,無需復雜的前處理過程[1]。隨著儀器與軟件的發(fā)展,NIR法已廣泛應用于農業(yè)、生物醫(yī)學、石油化工等領域[2-4]。
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