高效液相色谱法同时测定快安抗感冒液中5种组分的含量

 采用高效液相色谱法（HPLC）同时测定快安抗感冒液中对乙酰氨基酚、咖啡因、盐酸甲基麻黄碱、马来酸氯苯那敏和愈创木酚甘油醚的含量。色谱柱为NOVA－PAKC_18柱,流动相为V（已腈）：V（0．03mol／L磷酸氢二铵）：V（0．004mol／L庚烷磺酸钠）：V（三乙胺）=12：44：43．5：0．5,并用磷酸调节pH值至3．0;检测波长220nm,柱温35℃。在此色谱条件下,各组分均获得良好分离。平均回收率为98．0％～100．3％,相对标准偏差小于1．8％。     

反相高效液相色谱法测定人血浆中利培酮及其代谢物的质量浓度

建立了测定人血浆中利培酮及其活性代谢物9-羟利培酮质量浓度的反相高效液相色谱方法。用Zor－baxODSC18色谱柱,以V（甲醇）：V（水）：V（1mol／L醋酸铵）：V（3mol／L氨水）＝300：50：3：1为流动相,检测波长为280nm,流速为0．8mL／min。利培酮的线性范围为2～600μg／L（r＝0．996）,回收率为（98．2±3．5）％,日内与日间的标准偏差分别为4．12％和4．83％;9-羟利培酮的线性范围为2～800μg／L（r＝0．998）,回收率为（97．8±3．8）％,日内与日间的标准偏差分别为4．28％和4．81％。     

高效液相色谱法测定香连丸及组方药材中5种活性组分的含量

建立了香连丸及组方药材中药根碱、巴马汀、小檗碱、木香烃内酯和去氢木香内酯的含量测定方法．采用反相高效液相色谱,Hypersil ODS（5μm,4．6mm×250mm）色谱柱,流动相为乙腈：水（70：30,V：V）,流速1．0mL／min,柱温30℃,检测波长为210n／n测定木香烃内酯和去氢木香内酯的含量;采用高效液相胶束色谱,Kromasil ODS（5la,m,4．6mm×150mm）色谱柱,流动相为0．2mol／LNaH2P04水溶液：7．00mmol／L十二烷基硫酸钠：乙腈（35：35：30,V：V：V）,流速1．0mL／min,柱温30℃,检测波长为350nm测定药根碱、巴马汀、小檗碱的含量．结果显示5种活性成分在适当的线性范围内均具有良好的线性关系（r大于0．9993）,平均回收率在87．67％～102．37％之间,RSD小于3．13％;结果表明方法简便、灵敏、准确,重现性好．     

使用限进介质色谱柱的柱切换高效液相色谱法直接进样测定大鼠血浆中舒必利

提出一种直接进样测定大鼠血浆中舒必利浓度的高效液相色谱方法,使用限进介质色谱柱作为预柱在线去除血浆蛋白后,将舒必利通过柱切换转移到分析柱中进行分析。限进介质色谱柱为CAPCELLPAKMFSCX阳离子交换柱（20×4．0mmi．d．,5μm）,分析柱为Kromasil C18柱（150×4．6mm i．d．,5μm）,限进介质柱预分离时流动相为PH=6．88的50mmol／L磷酸盐缓冲液乙腈（100：5,V／V）,切换后分析流动相为PH=6．83的50mmol／L磷酸盐缓冲液-乙腈（100：10,V／V）。流速均为1mL／min,检测波长为240nm。该方法检出限为17ng／mL,定量限为50ng／mL。舒必利在50～1400ng／mL之间线性良好（r=0．9997）,高中低浓度的日内、日间相对标准偏差分别为1．5％～4．2％及2．0％～5．2％,方法回收率为98．8％～104．1％．     

多功能柱净化-高效液相色谱法检测谷物中的玉米赤霉烯酮

建立了玉米和小麦中玉米赤霉烯酮（ZEN）的多功能柱净化-高效液相色谱检测方法。样品经乙腈-水混合溶剂（V（乙腈）：V（水）=84：16）提取，通过多功能净化柱（MFC）进行一次性净化，以Symmetry^R C18柱为分离柱，甲醇-水（V（甲醇）：V（水）=68：32）为流动相进行高效液相色谱分离和检测。玉米赤霉烯酮的质量浓度在0．01～4．0μg／mL范围内呈良好线性，相关系数为0．9996。检出限为0．04μg／g，在0、04—5．0mg／kg添加范围内的回收率为87．5％～98．6％，相对标准偏差为1．5％～8．3％。     

铅形态的高效液相色谱-电感耦合等离子体质谱分析

用50mm的反相高效液相色谱短柱在V甲醇/VH2O=55／45,其中水相为0．1mol／L乙酸0．1mol／L乙酸铵的缓冲溶液（pH=4．70）,流速0．6mL／min条件下,约10min内实现了无机铅离子（Pb^2＋）、氯化三甲基铅（TML）、氯化三乙基铅（TEL）和氯化三苯基铅（TPhL）的高效液相色谱．电感耦合等离子体质谱（HPLC-ICP-MS）联用分析。4种铅形态在去离子水和自来水中的加标回收率分别为93．8％-115．6％和89．3％-137．8％;峰强度和保留时间的RSD分别为7．4％-14．3％和0．5％-1．3％;仪器检出限及方法检出限分别为0．27-3．07μg/L和1．20-2．33μg／L。     

高效液相色谱法测定前列泰片中山萘素的含量

建立了测定中药复方制剂前列泰片中山萘素含量的高效液相色谱方法．采用Kromasil C18色谱柱（5μm,250mm×4．6mm）,以甲醇：0．1％磷酸溶液=62：38（V／V）为流动相,流速1．0mL／min,检测波长为366nm．对样品水解过程中各个影响因素进行了考察,获得优化的水解条件为采用4．5mol／L盐酸溶液,80℃水浴上水解1．5h．山萘素在0．061～610μg／mL范围内峰面积与浓度呈良好的线性关系（r为0．9999）,最低检出限为0．03μg／mL,平均加标回收率为95．4％,RSD为1．4％．该方法简便、准确、重现性好,可用于前列泰片的质量控制．     

反胶束萃取-高效液相色谱法测定磺酸型偶氮染料

建立了水中磺酸偶氮染料甲基橙（MO）、刚果红（CR）和酸性铬兰K（ACBK）的反胶束萃取-离子对高效液相色谱定量检测的方法。采用Hypersil C18柱（250×4．6mm,5μm）,流动相为V（甲醇）／V（水）=63：37（含10mmol／L的KH2PO4、4mmol／L的四丁基溴化铵,KOH调pH=7．0）,流速为0.8mL／min,MO、CR和ACBK检测波长分别为449nm、505nm和526nm。结果表明,染料的回收率为92．9％～102．1％,相对标准偏差为0．9％～2．3％,水中MO、CR和ACBK的检出限分别为0．6μg／L、1．2μg／L和1．3μg／L。     

高效液相色谱法测定萨拉沙星

采用高效液相色谱法测定了萨拉沙星。色谱柱为μ－BondapakTMC18柱（3．9mm×300mm）,流动相为V（乙腈）：V（甲醇）：V（2mmol／L磷酸,用三乙胺调pH3．5）＝30：5：65,用二极管阵列检测器检测,检测波长278nm,得到了满意的分离效果。     

离子色谱荧光检测法测定废水中痕量2-氨基联苯和4-氨基联苯

采用离子色谱荧光检测法测定废水中的2－氨基联苯（2－ADP）和4－氨基联苯（4－ADP），流动相为1．0mL/min的0．06mol/L NaCl,0.08mol/L HCl,40%(V/V)ACN，分离柱为Dinoex OmniPac PCX-500，该法具有良好的重现性和线性关系，2－ADP和4－ADP的回收率分别为98．5％－101．4％和102．2％－104．0％，检测限分别为0．006mg/L和0．10mg/L。     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.