柴达木唐古特白刺色素中矿物质元素分析

对唐古特白刺色素的矿物质元素进行了分析。结果表明,在色素中Na、K、Ca含量高,这与白刺生长在盐碱地有关;Fe、Zn、Cu、Mn、Se等必需微量元素含量丰富;有害元素含量低。为唐古特白刺色素在食品和饮料中的应用提供了基础数据。     

柴达木地区唐古特白刺和西伯利亚白刺中矿物质元素的分析

白刺在传统藏医用药，民间用药中均有广泛用途。利用220FS型原子吸收光谱仪测定了柴达木地区的唐古特白刺和西伯利亚白刺各部位中钾，钠，钙，镁，铜，锌，铁，锰8种矿物质元素。结果表明，两种白刺中矿物质元素含量各民，且因部位不同而异，但又呈现一定的规律性，除锌外，其它元素含量分布大致为叶＞枝＞果皮＞果核＞果汁，锌元素主要分布在枝和果核中。     

野生唐古特大黄矿物元素含量特征

对比青海果洛境内野生唐古特大黄中10种矿物质元素含量特征,用原子吸收光谱法分析了其常量元素K、 Na、 Ca、 Mg 、 P及微量元素Cu、 Zn、 Fe、 Mn、 Al含量。结果表明,唐古特大黄根部与其土壤环境呈现出不同的矿物质元素含量特征,植物中Na、 Ca和P总体表现出富集趋势。矿物质元素含量在不同居群的差异,提示在不同的生境条件下唐古特大黄对矿物质元素采取选择性吸收。     

青海野生椭圆叶花锚中矿物质元素特征

为了对比分析青海不同地区椭圆叶花锚中矿物质元素含量，分别采集了不同地区花期椭圆叶花锚全植株，采用原子吸收光谱仪分析了其钾、钠、钙、镁等矿物质元素含量。结果表明，青海野生椭圆叶花锚中钾、钠、钙、镁等矿物质元素总量具有随着地理纬度减小而降低的特征。     

毛细管电泳法分析唐古特白刺种子中两种生物碱

利用毛细管电泳法分离测定唐古特白刺种子中的尿囊素和吲哚生物碱1-methyl-1,2,3,4-tetrahydro--βcarboline-3-carboxylic acid(MTCCA),所用毛细管规格为48.5 cm×50μm i.d.,DAD检测波长220 nm,最佳分离条件:电压19 kV,分离温度25℃,背景电解质为含有32 mmol/L SDS,体积分数10.0%乙腈的32mmol/L硼酸溶液,pH 10.0。MTCCA与尿囊素分别在350.0~11.0μg/mL和112.5~3.5μg/mL质量浓度范围内与电泳峰面积呈现良好线性关系,检出限分别为5.0μg/mL和2.5μg/mL。对标准品进行6次测定,迁移时间的RSD为1.1%和1.4%,峰面积的RSD为2.3%和0.82%。     

食用菌类中矿物质元素的研究

用火焰原子吸收分光光度法对广东清远笔架山的 1 7种食用菌、 2种木耳及灵芝中赤芝的 8种矿物质元素进行了测定。结果表明 ,食用菌类是优质食品 ,富含对人体有益的微量元素 ,有较高营养价值     

白刺与枸杞中微量元素含量的对比研究

采用ICP-AES法对生长在同一区域内的白刺与枸杞根茎中的8种微量元素的含量进行了分析测定。结果表明,两种植物根茎中8种元素含量丰富,并且差异明显,为以后的开发利用提供了基础数据。     

湛江产杨桃叶中6种矿物质元素的测定

用火焰原子吸收光谱法测定了湛江产甜、酸杨桃叶中Cu、Zn、Mn、Fe、Mg、Ca元素的含量。结果表明,甜、酸杨桃叶中含有丰富的Ca、Mn、Mg;甜、酸杨桃叶中的6种元素比较,除了Ca,甜杨桃叶中的Mn、Mg、Fe、Zn、Cu含量均高于酸杨桃。实验可为更好的开发和利用杨桃叶资源提供实验数据。     

RP-HPLC法测定唐古特铁线莲中芦丁的含量

建立了唐古特铁线莲中芦丁含量测定的RP-HPLC方法.色谱条件:采用C18柱 (4.6 mm×250 mm,5 μm),流动相:V(甲醇)∶V(0.4% H3PO4)=55∶45,流速:1.0 mL/min,柱温:30 ℃,检测波长:360 nm,芦丁在0.24～1.2 μg范围内成良好的线性关系,r=0.9992,回收率RSD=1.0%,对青海省不同地区唐古特铁线莲中芦丁进行了定量分析,测定结果:不同产地该药材中芦丁的含量有较大差异,含量在0.119%～0.317%之间.     

ICP-AES法测定鸡汤中多种矿物质元素

采用电感耦合等离子体发射光谱法(ICP - AES)对不同烹煮时间的鸡汤及加不同量冰乙酸烹煮的鸡汤中Ca、Mg、Fe、Cu、Zn等5种矿物质元素进行了分析研究.结果表明,不同烹煮时间的鸡汤中Ca、Mg、Fe、Cu、Zn溶出量有显著性差异(P＜0.01),Ca、Fe的溶出量随着时间的增加而增加;加冰乙酸烹煮的鸡汤中Ca、...     

大果白刺游离脂肪酸的柱前衍生高效液相色谱-荧光检测法分析

采用2-（11H-苯[a]咔唑）乙基对甲苯磺酸酯（BCETS）为柱前荧光衍生试剂,通过梯度洗脱使得18种脂肪酸在BDS-C8柱上得到良好的分离.方法应用于大果白刺不同部位中游离脂肪酸的分析,结果表明大果白刺的果皮果肉和叶子中均含有大量的不饱和脂肪酸,其总不饱和脂肪酸含量分别为70.74%和73.47%.大果白刺种子中不饱和脂肪酸的含量相对较少,仅占总脂肪酸含量的57.21%,其不饱和脂肪酸组成主要是C18∶1（油酸）和C18∶2（亚油酸）.其中,大果白刺的果皮果肉中,不饱和脂肪酸主要是C18∶1、C18∶2和C18∶3（亚麻酸）.其叶子中的不饱和脂肪酸主要是C18∶3,所占总脂肪酸比例为48.34%.首次对大果白刺中的脂肪酸进行了分析,可以为大果白刺在食品、药品中的进一步开发应用和质量控制提供一定的数据支持.     

Triterpene Glycosides from Kalopanax septemlobum. III. Glycosides D2, I1, and K1 from Leaves of Kalopanax septemlobum var. maximowiczii Introduced in Crimea

The new caffeylated triterpene glycosides hederagenin 3-O-(6-O-caffeyl-β-D-glucopyranosyl)-(1→4)-O-β-D-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→2)-O-β-L-arabinopyranoside and its 28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl and 28-O-α-L-rhamnopyranosyl-(1→4)-O-6-O-acetyl-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl esters were isolated from leaves of Kalopanax septemlobum var. maximowiczii introduced in Crimea. The structures of these compounds were established using chemical methods and NMR spectroscopy.__________Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 263–267, May–June, 2005.     

Evolution of Brassica rapa var. rapa L. volatile composition by HS-SPME and GC/IT-MS

Brassica rapa var. rapa L. (turnip) is highly appreciated and consumed by human. In this work, the volatile profile of B. rapa var. rapa was studied during the maturation process. The volatiles of seeds, sprouts with 6 and 9 days, and adult plant were determined using headspace solid-phase microextraction (HS-SPME) combined with gas chromatography/ion trap-mass spectrometry (GC/IT-MS).Several constituents, including alcohols, aldehydes, esters, ketones, norisoprenoids, nitrogen and sulphur compounds were characterized, totalizing 64 compounds. Isothiocyanates are the main volatiles in all matrices, being 3-butenyl isothiocyanate the major compound. Qualitative and quantitative differences were found among the analysed materials. Nitrogen and sulphur compounds decreased during the maturation process, while terpenes, aldehydes, norisoprenoids and ester compounds were present in higher amounts during germination, especially in sprouts with 9 days of development.     

五味子中木脂素类成分的高效液相色谱-电喷雾质谱研究

采用液相色谱-电喷雾质谱联用(HPLC-ESI-MSⁿ)技术, 对北五味子与南五味子中木脂素类成分进行了系统研究. 通过HPLC-ESI-MS技术, 获得了相应化合物的保留时间、紫外光谱和分子量等信息, 利用电喷雾多级串联质谱技术(ESI-MSⁿ), 获得了相应化合物的结构信息. 研究结果表明, 北五味子与南五味子的主要木脂素成分除5个共有成分外其它成分差异较大, 并且其共有成分含量差别较大. 在此基础上, 建立了简便、快速的北五味子与南五味子药材分析鉴定的新方法.     

Triterpene Glycosides from Kalopanax septemlobum. 1. Glycosides A, B, C, F, G1, G2, I2, H, and J from Leaves of Kalopanax septemlobum var. Maximowichii Introduced to Crimea

Eight known glycosides of hederagenin and the new triterpene glycoside 3-O-β-D-xylopyranosyl-(1→3)-O-α-L-rhamnopyranosyl-(1→2)-O-α-L-arabinopyranosyl-28-O-α-L-rhamnopyranosyl-(1→4)-O-6-O-acetyl-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester of hederagenin were isolated by chromatographic methods from leaves of Kalopanax septemlobum var. maximowichii introduced to Crimea. The known 3-O-α-L-arabinopyranosyl-28-O-α-L-rhamnopyranosyl-(1→4)-O-6-O-acetyl-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester of hederagenin was observed for the first time in Kalopanax septemlobum.__________Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 156–159, March–April, 2005.     

A Validated HPLC Method for Quantification and Optimization of Furocoumarins in Different Extracts of Fruits of Heracleum candicans

Heracleum candicans Wall. ex DC (Apiaceae) finds use as an aphrodisiac, nerve tonic and also in the treatment of skin diseases in the Indian system of medicines and is reported to be rich in furocoumarins which are extensively used in pharmaceutical industry for their photosensitizing activity on human skin. Thus a HPLC–PDA method has been developed for the selection of suitable solvent for extraction and quantitative estimation of these furocoumarins viz. heraclenol, heraclenin, bergapten and psoralen in fruits of H. candicans. The results indicate that heraclenol is found to be maximum in 30% aqueous methanolic extract (0.108%) while the maximum concentration of heraclenin (anti-inflammatory principle) and bergapten (melanogenesis stimulation activity) was found in the pure methanolic extract (0.386 and 0.281%, respectively). However psoralen (anti-psoriatric principle) was found in very low concentration in all the extracts. Further validation of the method was done in view to demonstrate its selectivity, linearity, precision, accuracy and robustness. The method thus developed can be applied in quality evaluation of H. candicans.