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细风轮菜挥发油成分的GC-MS分析 总被引:3,自引:0,他引:3
用水蒸气蒸馏法提取细风轮菜挥发油,用毛细管气相色谱-质谱联用法结合计算机检索对其化学成分进行了分析和鉴定,结果显示,从细风轮菜挥发油中鉴定出31个化合物,占挥发油色谱总峰面积的97.60%。用气相色谱峰面积归一化法测定了各组分的相对质量分数,细风轮菜挥发油中相对质量分数较高的成分是反-7,11-二甲基-3-亚甲基-1,6,10-十二碳三烯(21.81%)、1-辛烯-3-醇(16.99%)、顺-3-己烯醇(9.80%)、丙二醇(6.19%)、石竹烯(6.18%)。 相似文献
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研究了黔产荸荠杨梅果实(Myrica rubra Boqi)挥发油的化学成分。采用水蒸气蒸馏法制备荸荠杨梅挥发油,用气相色谱-质谱联用技术对荸荠杨梅的挥发油成分进行研究。从荸荠杨梅挥发油中检出51个色谱峰,鉴定了32个化合物,占挥发油总量的94.64%,主要化合物为:石竹烯(20.29%)、棕榈酸乙酯(18.35%)、5-羟甲基-1,3,3-三甲基-2-(3-甲基-1,3-丁二烯基)-环戊醇(12.66%)、2,2'-亚甲基双-(4-甲基-6-叔丁基苯酚)(9.38%)、邻苯二甲酸己烷-3-醇异丁醇酯(5.68%)、α-古巴烯(2.42%)、别香橙烯(2.36%)、β-谷甾醇(2.23%)、α-榄香烯(1.80%)和(1,4-二烷-2,5-二羟基)二甲醇(1.61%)。通过对其挥发油成分和含量的分析评价,为开发利用荸荠杨梅资源提供科学依据。 相似文献
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青皮挥发油化学成分的GC-MS分析 总被引:1,自引:0,他引:1
采用水蒸气蒸馏法提取青皮挥发油,通过气相色谱-质谱联用技术从青皮挥发油中分离鉴定出22种化学成分,相对含量最高的化合物为右旋柠檬烯,占挥发油总量的45.76%,其中,α-芹子烯、R)-(-)-对薄荷-1-烯-4-醇、1-甲基-4-(1-甲基乙烯基)-苯、2-(二乙氨基)-3-氟苯甲酸乙酯、正二十烷等10多种成分为首次从青皮中检出,为其进一步的研究利用提供了参考。 相似文献
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利用同时蒸馏萃取法(SDE)提取鹅不食草挥发油化学成分,通过气相色谱-质谱联用技术对各个色谱峰定性,并用色谱峰面积归一法获得各化合物的相对含量。结果从鹅不食草挥发油中共检测到66个色谱峰,占挥发油总量的95.106%,鉴定出55个化合物,占挥发油总量的91.668%。鹅不食草挥发油主要的成分为反式乙酸菊稀酯(41.361%)、10-acetoxy-8,9-epoxythymol isobutyrate(5.422%)、百里酚(3.389%)、3-异丙基-4-甲基-3-戊烯-1-炔(2.644%)、(-)-环氧石竹烯(2.509%)、(1S)-6,6-二甲基二环[3.1.1]庚-2-烯-2-基甲醇乙酸酯(2.613%)等。 相似文献
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内折香茶菜叶挥发油的化学成分 总被引:1,自引:0,他引:1
用水蒸气蒸馏法、两相溶剂萃取法从新鲜内折香茶菜叶中提取挥发油,用气相色谱-质谱联用技术对挥发油的化学成分进行了分析,用气相色谱面积归一法测定了各个成分的相对质量分数。共分离出16个峰,鉴定出16个化学成分。内折香茶菜挥发油中的主要成分为香芹酚(相对质量分数76.45%)、石竹烯(5.65%)、1-甲基-4-(1-异丙基)-1,4-环己二烯(3.68%)和2,6-二甲基-6-(4-甲基-3-戊烯基)-双环[3.1.1]2-庚烷(2.74%)。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献
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