简介:摘要目的建立高效液相色谱-质谱联用法测定抗风湿类中药制剂中非法添加地塞米松的方法。方法色谱柱C18柱(4.6mm×250mm,5μm);流动相乙腈-水(20∶80);流速1ml/min;检测波长240nm。结果地塞米松在20.66~103.30μg/ml范围内浓度与峰面积呈良好的线性关系(r=0.9998),平均回收率为99.1%,RSD=0.7%。结论本法灵敏、准确、简单、快速,可作为抗风湿类中药制剂中添加地塞米松的检测方法。
简介:摘要目的利用气相色谱串联质谱(GC/MS/MS)联用技术定性分析生物检材中三唑磷。方法生物检材经丙酮-水混合液浸泡提取,提取浓缩液经固相萃取柱净化,用GC-MS-MS进行分析。结果表明,该方法可用于中毒生物样品中三唑磷的快速分析。
简介:目的建立超高效液相色谱-串联质谱(UPLC—MS/MS)法测定人血中雪上一枝蒿甲素含量的方法。方法样品经乙酸乙酯提取后,Ci8柱分离,以0.1%甲酸乙腈-0.1%甲酸水为流动相梯度洗脱,正离子-多反应离子监测模式(ESI+-MRM)测定雪上一枝蒿甲素,定性定量离子对分别为344.3/58.0、344.3/91.0。结果雪上一枝蒿甲素在3.5~850ug/L-1。范围内与峰面积呈现良好的线性关系(r=-0.9968),检测限为0.1Iμg/L-1,日内、日间精密度均〈10%,低、中、高三个浓度下准确度(n=5)为97.2%-115.2%,回收率(n=5)为86.6%~89.4%。结论该方法操作简便,结果准确,可作为测定人血中雪上一枝蒿甲素含量的方法。
简介:目的研究朝鲜苍术挥发油成分,为朝鲜苍术的药用价值及合理开发利用提供参考。方法采用水蒸气蒸馏法提取挥发油,GC毛细管柱色谱法进行分析,峰面积归-化法确定其相对含量,气相色谱-质谱联用技术辅助人工检索鉴定其化学成分。结果从朝鲜苍术的挥发油中分离出58种,鉴定出55种化学成分,鉴定出的挥发性化学成分占挥发油总量的79.94%,主要成分有苍术酮(31.1831%)、3-羟基-6β-环丙烷-5β-胆甾烷(12.3086%)、5α-螺甾烷(11.2161%)、巴伦西亚橘烯(7.05606%)、γ-榄香烯(4.24732%)、菜油甾醇(2.11089%)、石竹烯(1.44473%)、β-桉叶烯(1.43541%)、9,10-脱水-异长叶烯(1.21445%)、α-石竹烯(0.72132%)。结论朝鲜苍术挥发油的主要化学成分为倍半萜类化合物。
简介:Thesolid-phasemicroextraction(SPME)combinedwithgaschromatography/massspectrometry(GC/MS)wasusedtodetermineandanalyzeorganicpollutantsincokingwastewater.Basedonthefactthatthemaincompoundsinthewastewaterwereorganics,somekeyparametersoftheSPMEwereoptimized.Themethodhasgoodlinearity(itscorrelationcoefficients>0.99)intherangedetermined,itsrelativestandarddeviations(RSD)arelessthan15%,anditsrecoveryisfrom87.9%to128.1%withthelowestquantificationlimitof5μg/L.Thismethodhasbeenusedtomeasure15organicpollutantsinwastewaterfromacertaincokingplant.Theresultsshowthatcomparedwiththeconventionalmethod,itcansaveanhourinpretreatmenttime.Itisafast,low-cost,accurate,simpleandefficientanalyticalmethodindeed.
简介:ShearwavesplittingisstudiedbasedonthedigitalwaveformsofthreeseismicstationsDJS,SZDandWUJ,whichweresetupaftertheJiujiang-RuichangMS5.7earthquakeofNovember26,2005aroundtheepicenterarea.TheresultshowsthatthetimedelaysofslowshearwavesoftheDJSstation,whichisnotfarfromtheepicenterandwherethedistributionoffaultsiscomplexnearthestation,arerelativelylargerandthepolarizationdirectionsoffastshearwavesarenotconcentrated;thepredominantpolarizationdirectionoffastshearwavesofWUJstation,withsinglefaultdistributednearby,hasadifferenceof35°tothestrikeofthefaultandisinconsistentwiththedirectionofregionalprincipalcompressivestress.ThepredominantpolarizationdirectionoffastshearwavesofSZDstationwithnofaultsnearbyisinaccordancewithregionalprincipalcompressivestress.Thereisnoobviousregularrelationshipshipbetweenthedelaytimeandthefocaldepth.
简介:目的同时用液相色谱-质谱联用法(LC—MS/MS)和酶联免疫法(ELISA)检测患者体内25(OH)D3水平,分析两者结果的差异。方法随机选取50例住院患者,对同-血清样本分别用LC-MS/MS法和ELISA法测定25(OH)D3水平,同时用LC-MS/MS法测定25(OH)D2的水平。结果LC-MS/MS法测定的维生素D3的均数为14.99±6.51ng/mL,酶联免疫法测定的均数为20.91±9.70ng/mL,两者的相关系数为0.725(P〈0.01),线性相关方程为维生素D3(LC-MS/MS法)=4.829+0.486×维生素D3(ELISA法)。LC-MS/MS法组25(OH)D3浓度高于20ng/mL的比例17%,酶联免疫法组为52%,LC-MS/MS法组的25(OH)D2和25(OH)D3总浓度高于20ng/mL的为24%。25(OH)D2占25(OH)D总量的8.4%。结论LC—MS/MS法测定的维生素D3的数值明显低于ELISA法,两者正相关性较高,可经方程互换。酶联免疫法低估了体内维生素D的缺乏,检测25(OH)D3的同时需测定25(OH)D2浓度。
简介:目的建立ICP-MS同时测定红参中8种元素含量的分析方法.方法硝酸-高氯酸体系进行湿法消解,ICP-MS分析,同时分析锰、铜、锌、钡、钴、铁、镍、鎘8种元素.结果该方法线性范围宽,Mn、Cu、Zn、Ba、Co、Fe线性在0μg/L~500μg/L之间,Ni、Cd线性在0μg/L-100μg/L之间,线性相关系数0.9847~0.9999之间,检出限在0.0007~0.02mg/Kg之间.标准物质的RSD在4.45%~9.13%之间.结论利用该方法对标准物质茶叶中Mn、Cu、Zn、Ba、Co、Fe、Ni、Cd含量进行测定,表明该方法能够满足上述8种元素的分析要求.将方法应用于4、5年生红参中8种元素含量水平测定,获得了较满意的分析结果.
简介:通过建立脂肪酸成分提取及气相色谱质谱检测方法,对白鲜皮中脂肪酸进行提取并进行气相色谱质谱定量分析.采用索氏提取法提取白鲜皮中脂肪酸成分,利用气相色谱-质谱(GC-MS)联用技术进行分析鉴定,运用面积归一化法确定其相对百分含量.从白鲜皮中提出18种脂肪酸,并对成分进行鉴定,脂肪酸中主要成分是亚麻酸(38.76%),木蜡酸甲酯(20.67%),14-甲基十六酸甲酯(19.55%)等不饱和脂肪酸.
简介:Theheartistheprincipalorganthatcirculatesblood.Innormalconditionsitproducesfoursoundsforeachcardiaccycle.However,mostoftenonlytwosoundsappearessential:S1andS2.Twoothersounds:S3andS4,withloweramplitudethanS1orS2,appearoccasionallyinthecardiaccyclebytheeffectofdiseaseorage.Thepresenceofabnormalsoundsinonecardiaccycleprovidevaluableinformationonvariousdiseases.Theaorticstenosis(AS),asbeingavalvularpathology,ischaracterizedbyasystolicmurmurduetoanarrowingoftheaorticvalve.Themitralstenosis(MS)ischaracterizedbyadiastolicmurmurduetoareductioninthemitralvalve.Earlyscreeningofthesediseasesisnecessary;it'sdonebyasimpletechniqueknownas:phonocardiography.Analysisofphonocardiogramssignalsusingsignalprocessingtechniquescanprovideforcliniciansusefulinformationconsideredasaplatformforsignificantdecisionsintheirmedicaldiagnosis.Inthisworktwotypesofdiseaseswerestudied:aorticstenosis(AS)andmitralstenosis(MS).Eachonepresentssixdifferentcases.Theapplicationofthediscretewavelettransform(DWT)toanalysepathologicalseverityofthe(ASandMSwaspresented.Then,thecalculationofvariousparameterswasperformedforeachpatient.ThisstudyexaminesthepossibilityofusingtheDWTintheanalysisofpathologicalseverityofASandMS.
简介:Theauthorsstudiedtheseismicactivity,precursoryanomaliesandabnormalanimalbehaviorbeforetheApril14,2010MS7.1Yushuearthquake.AnalysisshowedthatanomalieswerenotrichbeforetheMS7.1Yushuearthquake,butprominentanomalieswereobserved,suchasthelongandmid-termtrendanomalycharacterizedbytheseismicquiescenceofMS6.0,MS5.0andMS4.0earthquakes,andtheanomaliesinprecursorobservationofsurfacewatertemperatureinYushuandDelinghaandelectromagneticmeasurementinPingan.Therewerealargenumberofanimalbehavioranomaliesappearingoneweekbeforetheearthquake.AnM4.7earthquakeoccurred130minutesbeforethemainshock.Inthispaper,westudiedthedynamicprocessoftheYushuearthquakepreparationusingtheearthquakefocalmechanismsolutionsontheBayanHarblockboundarysince1996.TheresultsshowthattheKalakunlunM7.1earthquakein1996,theManiM7.5earthquakeandtheYushuMS7.1earthquakehavethesamedynamicprocess.Longandmid-termtrendanomaliesmayberelatedtothedynamicsofevolutionofdifferentearthquakes.Thispaperalsodiscussestherecurrenceintervalofstrongearthquakes,foreshockidentificationandprecursorobservationoftheYushuMS7.1earthquake.
简介:[目的]对广西不同地区大叶按药材样品中的重金属含量进行测定和分析.[方法]采用电感耦合等离子体质谱法(ICP-MS)测定样品中锰(Mn)、砷(As)、铜(Cu)、镍(Ni)、铅(Pb)、铬(Cr)、镉(Cd)的含量.[结果]所测元素标准曲线的相关系数(r)均〉0.9998,回收率为84.12%~109.60%,相对标准偏差(RSD)均〈6%.[结论]所建立的方法简便、快速、准确、灵敏度高,可用于大叶桉中重金属元素的测定.
简介:摘要表面增强激光解析电离-飞行时间-质谱(SELDI-TOF-MS)技术是近年来蛋白组学研究的先进技术,文章主要介绍该技术在以下方面的应用寻找不同亚型非霍奇金淋巴瘤、儿童急性淋巴细胞白血病的潜在的生物标志物和探讨苯致白血病的发病机制;儿童急、慢性免疫性血小板减少症的早期诊断和预后监测;以及预测镰状细胞贫血患者急性疼痛发作的频率和严重程度,可能与载脂蛋白A1和血清淀粉酶A水平有关。