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1.
耿昭  李小红  苟琰  高必兴  齐景梁  钟恋  郭力 《中草药》2020,51(20):5337-5347
目的建立基于QuEChERS法结合气相色谱-串联质谱法(GC-MS/MS)对贝母类中药中53种农药残留量的快速检测方法,并应用于193批样品筛查。方法根据调研选择禁限用及常用农药作为检测指标。采用QuEChERS法对样品进行前处理,在气相色谱-串联质谱多反应监测(MRM)模式下进行测定,以3个添加水平测定样品的回收率和RSD。结果 53种农药在一定含量范围内线性关系良好,r均大于0.997 8;在1倍LOD(Limit of Detection)、2倍LOD、10倍LOD 3个添加浓度水平进行回收率试验中,86.8%的农药在60%~140%,RSD均小于15%;各农药检出限均小于0.01 mg/kg。193批贝母类中药种共检出14种农药,91批样品有检出,检出率为47.2%,仅有1批超出即将执行的《中国药典》2020年版限度规定。结论该方法检测指标具有一定针对性,且操作简便快速、灵敏可靠,适用于贝母类中药中农药残留的筛查测定。对于贝母类中药的生产种植和流通监管具有一定的参考意义。  相似文献   
2.
通过测定何首乌中多种真菌毒素的含量,探讨其致肝毒性原因。采用高效液相色谱-串联质谱法检测何首乌中黄曲霉毒素B1,B2,G1,G2,赭曲霉毒素A,B,T-2毒素,HT-2毒素,伏马毒素B1,B2,玉米赤霉烯酮和脱氧雪腐镰刀菌烯醇共12种真菌毒素的含量。样品采用改良的Qu ECh ERS方法提取,使用Welch Ultimate XBC18色谱柱(4.6 mm×100 mm,2.5μm)分离,甲醇-含0.1%乙酸的2 mmol·L~(-1)醋酸铵水溶液为流动相梯度洗脱,多反应监测模式下测定,外标法定量。结果表明,12种真菌毒素在0.1~200μg·kg~(-1)线性关系良好,相关系数为0.996 3~0.999 9,加标回收率为71.19%~98.68%,相对标准偏差为1.7%~13%。该方法操作简单、准确、灵敏,可用于何首乌中多种真菌毒素的快速测定。结果显示,41批样品中的15批检出了真菌毒素,涉及毒素类型有AFB1,AFG2,FB1,OTB,T-2,HT-2,FB2和OTA共8种,毒素在0.51~1 643.2μg·kg~(-1)。其中1批制首乌中检测到AFB1,达6.8μg·kg~(-1),超出了其在2015年版《中国药典》中的限量标准(5μg·kg~(-1))。AFB1具有明确的肝毒性。因此,推测何首乌在产地加工、储存运输过程中产生的少量霉变样品是其导致肝损伤的重要因素之一。  相似文献   
3.
目的 建立菊花茶中56种农药残留的分散固相萃取(QuEChERS) - 气相色谱串联三重四级杆质谱(GC - MS/MS)测定方法。方法 样品用乙腈提取,PSA+C18+GCB混合型分散固相萃取剂净化,DB - 5MS色谱柱分离,多反应监测模式(MRM)检测,外标法定量。结果 在0.005~500 mg/L范围内,56种农药的线性相关系数均≥0.995,方法定量限为0.002~0.057 mg/kg,平均回收率为60.0%~118.0%,相对标准偏差(RSD)为0.53%~20.09%。结论 该方法简单快速灵敏,可以实现菊花茶中农药残留的快速高通量检测。  相似文献   
4.
The official analytical method of the Taiwan Food and Drug Administration, Ministry of Health and Welfare for testing for veterinary drug residues in foods is the multiresidue analysis of β-agonists. Samples are pretreated through liquid–liquid extraction and solid-phase extraction. This method is time consuming and requires the intensive use of solvents. To improve analytical efficiency and reduce costs, our study incorporated QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) techniques to establish a new method of multiresidue analysis of β-agonists in animal muscle and viscera. The pretreatment time was shortened and solvent usage was minimized. The modified analysis was conducted using liquid chromatography/tandem mass spectrometry (LC–MS/MS) and quantification was performed using multiple reaction monitoring. The results demonstrated that the correlation coefficients of the tissue calibration curve were higher than 0.99 and the limit of quantification (LOQ) was 1 ppb. The average recoveries in spiked samples varied from 70% to 120%, and the relative difference between duplicated analysis results was lower than 10%. On the basis of the results, the proposed method was concluded to be an appropriate procedure for determining the presence of β-agonists, and demonstrated the advantages of high recovery rates in spiked samples, high precision, reduced analysis time and solvent usage, and lower costs.  相似文献   
5.
陈琛 《安徽医药》2017,21(2):255-258
目的 建立同时测定明目上清片中9种常见无机阴离子含量的离子色谱法.方法 采用改进的QuEChERS前处理方法净化样品,离子色谱法测定样品.用去离子水提取,N-丙基乙二胺(PSA)和C18净化,Ion Pac AS11-HC阴离子交换分析柱分离,氢氧化钾淋洗液梯度洗脱,洗脱25 min,流速为1.0 mL·min-1,柱温为30 ℃,进样量为30 μL.结果 9种常见无机阴离子均能达到基线分离,线性范围在0.5~50.0 mg·L-1之间,线性关系良好,相关系数为0.999 0~0.999 9范围内,仪器精密度、重复性和稳定性良好,平均加样回收率为90.26%~101.22%,RSD为0.51%~2.15%,仪器精密度、重复性和稳定性良好.结论 该方法简便快速和自动化,可用于明目上清片中无机阴离子含量的测定.  相似文献   
6.
目的 建立测定蔬菜和水果中多菌灵的灵敏快速高效液相色谱方法.方法 蔬菜和水果样品捣碎匀浆后用乙腈提取其中的多菌灵,采用QuEChERS方法进行净化后氮气吹扫浓缩,用流动相溶解后进样测定.采用Waters XBridgeTM C18色谱柱分离,以甲醇-水(1+1)为流动相等度洗脱,检测波长为286 nm.结果 样品中多菌灵在0.1~5.0 μg/ml范围内线性关系性良好,相关系数r为0.999,检出限为0.01 mg/kg,高、中、低不同水平的加标回收率在83.0%~ 94.0%之间,精密度在3.0%~9.1%之间.结论 该方法用于检测蔬菜、水果中多菌灵残留量,快速简便、灵敏、准确.  相似文献   
7.
该文建立了一种同时检测白茅根中16种真菌毒素的QuECh ERS(Quick,Easy,Cheap,Effective,Rugged,Safe)超高效液相色谱串联质谱定量分析方法。白茅根以1%乙酸-乙腈超声提取,QuEChERS方法净化,用甲醇和含0.01%甲酸水溶液为流动相进行梯度洗脱,超高效液相色谱仪应用Agilent Eclipse Plus C_(18)色谱柱,优化选择在电喷雾离子源正离子模式下以多反应监测方式检测。结果表明,16种真菌毒素在各自线性范围内线性关系良好,相关系数r在0.996 2~1.000,定量限为0.03~186.68μg·kg~(-1),回收率为60.28%~129.2%,RSD为0.29%~11%。该方法净化效果好、灵敏度高、重复性好,适用于基质成分复杂的白茅根中多种真菌毒素的定量检测。  相似文献   
8.
目的:建立液相色谱-串联质谱方法检测蔬菜水果中的多菌灵残留量。方法:采用QuEChERS样品前处理技术,液相色谱-电喷雾串联质谱法进行检测。结果:样品中多菌灵检测限为1μg/kg,回收率为86.4%~99.5%,相对标准偏差小于12%。结论:本法用于检测蔬菜中的多菌灵残留量,快速、灵敏、特异性强。  相似文献   
9.
A multiresidue analytical method was developed for grapes for the following 24 plant growth regulators: 1-naphthylacetamide, 2,3,5-triiodobenzoic acid, 2,4,5-T, 2-naphthoxyacetic acid, 3-indolylacetic acid, 4-(3-indolyl)-butyric acid, 4-chlorophenoxyacetic acid, 4-nitrophenol, 6-benzylaminopurine, N6-isopentenyladenine, butralin, chlormequat chloride, chlorphonim-Cl, cloprop, forchlorfenuron, gibberellic acid 3, gibberellic acid 4, gibberellic acid 7, inabenfide, mepiquat chloride, paclobutrazol, prohydrojasmon, thidiazuron and uniconizole-P. The compounds were extracted from grape samples using an extraction method modified from the Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method. Liquid chromatography – tandem mass spectrometry was used for the detection and quantification of the compounds. Validation of the method was performed by using recovery studies at both intra-day and inter-day intervals, as well as by evaluation of the matrix effect, limit of quantification, trueness and precision. We used matrix-matched calibrations for the quantification of the compounds, which all resulted in determination coefficients (r2) higher than 0.995. The limit of quantification ranged from 0.1 to 5 ng/mL. Recovery studies using three spiking concentrations at varying levels showed recoveries of 70.2–112.6% and 67.5–101.8% at intra-day and inter-day intervals, respectively. Relative standard deviations were below 20% for the recovery studies. The extraction method were further validated by performing recovery study and matrix effect test in six different grape varieties from Taiwan and the United States and all resulted in comparable results. Application of the established method to 50 grape samples, resulted in the detection of chlormequat chloride and forchlorfenuron residues in the tested grapes. The results of the method validation and real sample analysis shows the extraction method is therefore suitable for routine monitoring of residue in grapes.  相似文献   
10.
目的:建立用车载式气相(色谱仪)现场快速检测9种有机磷农药残留的分析方法。方法:采用改进的QuECh-ERS前处理方法、SRI 8610C车载式气相色谱仪(选用DB-1701毛细管柱、FPD检测器)对9种农药残留进行检测。结果:浓度在0.1~2.0μg/ml范围的标准曲线,其线性相关系数在0.9959~0.9991之间,样品加标回收率为80.0%~108.0%,RSD为2.35%~11.78%,最低检出限为0.052~0.114 mg/kg。结论:本方法简便、快速、安全,可用于果蔬样品农药残留的现场检测。  相似文献   
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