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Pushp Pal SinghMarleny D.A. Saldaña 《Food research international (Ottawa, Ont.)》2011,44(8):2452-2458
Potato peel, a waste generated from potato processing, is a disposal problem. But, potato peel is a good source of functional ingredients such as phenolic compounds. This study investigated the extraction of eight phenolic compounds (Gallic acid, GAC; Chlorogenic acid, CGA; Caffeic acid, CFA; Protocatechuic acid, PCA; Syringic acid, SGA; p-hydroxyl benzoic acid, PBA; Ferulic acid, FRA and Coumaric acid, CMA) from potato peel using subcritical water.Experiments were performed in a batch stainless steel reactor at 6 MPa, 2 mL/min and temperatures ranging from 100 to 240 °C at residence time of 30 to 120 min. High recoveries of phenolic compounds (81.83 mg/100 g; wet basis wb) were obtained at 180 °C and extraction time of 30 min compared to 3 h extraction with methanol (46.59 mg/100 g wb). CGA (14.59 mg/100 g wb) and GAC (29.56 mg/100 g wb) were the main phenolic compounds obtained from potato peel at 180 °C. Subcritical water at 160 to 180 °C, 6 MPa and 60 min might be a good substitute to organic solvents such as methanol and ethanol to obtain phenolic compounds from potato peel. 相似文献
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While other extraction methods have been tempted, a microwave-assisted extraction (MAE) method coupled with the orthogonal array design was investigated for efficient extraction of the phenolic compounds in potato downstream wastes. Four parameters were examined for the MAE of the total phenolic content (TPC) and optimized at 60% ethanol, 80 °C, 2 min, solid-to-solvent ratio 1:40 (g/ml). The MAE was proven more efficient than the conventional solvent extraction by refluxing. The optimized model showed that the downstream wastes, both the supernatant and the residue contained high TPC, particularly the former (11.0 ± 0.26 mg GAE/g DW). The antioxidant activities (DPPH and FRAP) closely correlated with the TPC of the samples (r = 0.92–0.97). Chlorogenic acid and caffeic acid were found to be the predominant phenolic acids. The extracts of the downstream wastes from potato processing can be a promising candidate for functional foods and nutraceutical ingredients. 相似文献
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Carotenoids constitute an important component of waste originating from tomato processing plants. Studies were carried out to assess the extraction yield of tomato waste carotenoids in different solvents and solvent mixtures and to optimise the extraction conditions for maximum recovery. A mixture of ethyl acetate and hexane gave the highest carotenoid extraction yield among the others examined. Extraction conditions, such as percentage of hexane in the solvent mixture of ethyl acetate and hexane, ratio of solvent to waste and particle size were optimised using a statistically designed experiment. A regression equation for predicting the carotenoid yield as a function of three extraction variables was derived by statistical analysis and a model with predictive ability of 0.97 was obtained. The optimised conditions for maximum carotenoid yield (37.5 mg kg−1 dry waste) were 45% hexane in solvent mixture, solvent mixture to waste ratio of 9.1:1 (v/w) and particle size 0.56 mm. 相似文献
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采用响应面法优化了血柚皮果胶的提取工艺,在单因素实验基础上,选取柠檬酸浓度、提取温度、液料比和提取时间为自变量,果胶得率为响应值,根据Box-Behnken实验设计方法,对提取血柚皮果胶的关键因素参数进行了优化,建立了血柚皮果胶得率的数学模型。结果表明:四个因素对血柚皮果胶得率的影响大小依次为提取温度>柠檬酸浓度>液料比>提取时间;血柚皮果胶提取的最佳工艺参数为:柠檬酸浓度1.5%,提取温度82℃、液料比32∶1m L/g、提取时间99min。在此条件下,血柚皮果胶得率达18.85%,与预测值仅相差0.32%,验证了数学模型的有效性。 相似文献
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K. Nagendra Prasad Fouad Abdulrahman Hassan Bao Yang Kin Weng Kong Ramakrishnan Nagasundara Ramanan Azrina Azlan Amin Ismail 《Food chemistry》2011
The optimum extraction conditions for highest recovery of total phenolics content (TPC) and antioxidant capacities (AC) were analysed for Mangifera pajang peels (MPP), using response surface methodology. The effects of ethanol concentration (X1: 20–80%), extraction temperature (X2: 30–65 °C) and liquid-to-solid ratio (X3: 20–50 mL/g) on the recovery of total phenolics (Y1) and antioxidant capacity (Y2) were investigated. A second order polynomial model produced a satisfactory fitting of the experimental data with regard to total phenolic content (R2 = 0.9966, p < 0.0001) and antioxidant capacity (R2 = 0.9953, p < 0.0001). The optimum extraction conditions for TPC were 68%, 55 °C and 32.7 mL/g, and for AC were 68%, 56 °C and 31.8 mL/g, respectively. Predicted values for extraction of TPC and AC agreed well with the experimental values. Liquid chromatography–mass spectrometry of the optimally obtained extracts from MPP revealed the major phytochemicals as mangiferin, gallic acid, catechin and epicatechin. 相似文献
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目的采用正交法优化柿果皮中总三萜酸的超声提取工艺。方法以"牛心柿"柿果皮为原料,利用紫外分光光度计法测定柿果皮中总三萜酸的含量,并从提取溶剂选择及其浓度、料液比、超声时间和温度等方面,通过单因素实验和正交试验确定超声提取柿果皮总三萜酸的最佳条件。结果最佳超声提取工艺为:在超声功率240 W的前提下,提取溶剂为75%(V/V)的乙醇、料液比1:15(m/V)、时间45 min、温度50℃。在此条件下,柿果皮总三萜得率最高可达39.33mg/g。结论优化后的方法简单、快速、准确、提取率高,适合提取柿果皮的总三萜酸。 相似文献
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Potato cell wall was used as low-value source for the enzymatic extraction of galactan-rich rhamnogalacturonan I (RG I). The effects of selected reaction parameters of endo-polygalacturonase from Aspergillus niger-catalyzed isolation of RG I and their interactions were investigated by response surface methodology. Models were developed to relate independent parameters (cell wall concentration, enzyme amount, reaction time) to responses (yield, neutral sugar content, saccharide molar composition, weak acidic fraction proportion). The most significant parameters that affected extracted polysaccharide yield and its galactose (Gal) and arabinose (Ara) contents were the cell wall concentration and enzyme amount. The interaction between the cell wall concentration and the reaction time was the most determinant for the yield. However, the cell wall concentration and the enzyme amount exhibited significant interaction effect on Gal and Ara contents. Comparison of predicted and experimental values validated the established predicted models, which can be used to identify the conditions for the isolation of RG I-type pectic polysaccharides with selected structural and saccharide composition properties. The monosaccharide composition and the linkage patterns confirmed the isolation of galactan-rich RG I type pectic polysaccharides. The present study is expected to increase the capability to generate RG I targeting specific composition and functional properties. 相似文献
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香蕉皮中果胶提取工艺的研究 总被引:10,自引:1,他引:10
采用盐析的沉淀方法对香蕉皮果胶的提取工艺进行了系统研究。通过L9(34)正交实验,得出酸解工艺的最优化条件为:以pH1.5的盐酸溶液为萃取剂、液料比5mL/g、温度95℃、时间2h、螯合剂六偏磷酸钠添加量为0.3%;盐析的最优化条件为:每100mL果胶液中加入7mLAl2(SO4)3饱和溶液,边均匀搅拌边用浓氨水调pH至4.5左右,70℃保温45min;果胶盐脱盐的条件为:每5g果胶盐置于200mL脱盐液(组成为60%乙醇 3%盐酸 37%水,V/V)中,边搅拌边脱盐30min左右,所得果胶产量0.7846g。 相似文献
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Muhammad Kamran Khan Maryline Abert-VianAnne-Sylvie Fabiano-Tixier Olivier DanglesFarid Chemat 《Food chemistry》2010
The present study reports on the extraction of polyphenols especially flavanones from orange (Citrus sinensis L.) peel by using ethanol as a food grade solvent. After a preliminary study showing that the best yield of extraction was reached for a particle size of 2 cm2, a response surface methodology (RSM) was launched to investigate the influence of process variables on the ultrasound-assisted extraction (UAE) followed by a central composite design (CCD) approach. The statistical analysis revealed that the optimised conditions were a temperature of 40 °C, a sonication power of 150 W and a 4:1 (v/v) ethanol:water ratio. The high total phenolic content (275.8 mg of gallic acid equivalent/100 g FW), flavanone concentrations (70.3 mg of naringin and 205.2 mg of hesperidin/100 g FW) and extraction yield (10.9 %) obtained from optimised UAE proved its efficiency when compared with the conventional method. Furthermore, the antioxidant activity determined by the DPPH and ORAC tests confirmed the suitability of UAE for the preparation of antioxidant-rich plant extracts. 相似文献
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【目的】柑橘皮抗氧化活性成分的提取工艺参数不明确,本研究采用确定性筛选设计结合设计空间法优化柑橘皮抗氧化活性成分的提取工艺。【方法】首先采用确定性筛选设计考察料液比、碱用量、醇体积分数、提取次数、提取温度和提取时间6个因素对提取效果的影响。然后,代表性抗氧化活性成分橙皮苷、芸香柚皮苷、圣草次苷的峰面积之和作为评价指标,6个因素作为变量因素,通过多元回归算法建立定量模型。基于模拟实验测定误差法计算获得关键因素与评价指标之间的设计空间。【结果】提取过程中,抗氧化活性成分的关键影响因素有3个,分别为提取次数、提取温度和料液比,并成功验证。该3个因素推荐的操作空间是提取次数为1.5~2.9,提取温度为30.2~35.0 ℃,料液比为51:1~60:1。【结论】本研究优选了提取工艺涉及的六个参数对抗氧化活性成分提取的影响,推荐的操作空间可使代表性抗氧化活性成分的峰面积达标概率达到 0. 96 以上,为工业化提取柑橘皮抗氧化活性成分提供了参考。 相似文献
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微波辅助提取苹果皮中的多酚类物质 总被引:4,自引:0,他引:4
以苹果皮为原料提取苹果多酚,对不同提取剂的提取效果进行了比较;通过单因子试验和正交试验对微波辅助提取多酚的工艺条件进行了探讨,研究了溶剂浓度、微波功率、微波处理时间以及料液比对多酚提取的影响;并对微波辅助提取和常规法提取的效果进行了比较。结果表明:综合考虑提取效果及食品安全性,选择乙醇作为提取剂为宜;微波辅助提取的最佳工艺条件为乙醇浓度70%、微波功率210W、微波时间25s、料液比(w/v)1∶5;微波辅助提取法提取物中原花色素含量0.3668mg/ml,常规法提取物中原花色素含量0.2552mg/ml,微波辅助提取效果优于常规法提取。 相似文献