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毛细管气相色谱法测定速效伤风胶囊中对乙酰氨基酚、咖啡因、马来酸氯苯那敏的含量 总被引:3,自引:0,他引:3
用5%Ph-Me-Silicone毛细管色谱柱,FID,二阶程序升温,以正十六烷作为内标物测定速效伤风胶囊中对乙酰氨基酚、咖啡因、马来酸氯苯那敏的含量。浓度线性范围:对乙酰氨基酚4~20g/L,咖啡因0.084~0.42g/L,马来酸氯苯那敏0.15~0.75g/L。平均回收率(n=5):对乙酰氨基酚99.62%(RSD=0.44%)咖啡因96.46%(RSD=1.32%),马来酸氯苯那敏98.55%(RSD=0.65%)。 相似文献
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水溶性金属卟啉肿瘤靶向磁共振成像造影剂的研究 总被引:5,自引:0,他引:5
利用显微荧光-阿达玛变换三维图像分析研究了Cu-TSPP,Mn-TSPP,Cu-TMAP,Mn-TMAP4种水溶性金属卟啉人细胞间质进入肿瘤细胞内的富集过程,对金属卟啉的自旋-晶格驰豫性能(R1)的天空结果表明,Mn(Ⅱ)卟啉配合物的R1、值结Gd-DTPA提高1.5-2倍。 相似文献
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高效液相色谱手性流动相法拆分甲状腺素对映体 总被引:5,自引:0,他引:5
运用高效液相色谱手性流动相法(HPLC-CMP)对影响甲状腺素对映体(D-,L-T4)分离方法的因素:三乙胺(TEA)浓度,流动相pH值,铜离子(Cu2+)浓度,L-脯氨酸(L-pro)浓度,柱温以及流动相的流速进行了系统的研究。同时,考察了色谱方法分离T4对映体的线性关系,精密度和准确度。线性响应范围为0.6~3.2 nmol (D-,L-T4),线性相关系数为rD-T4=0.9980,rL-T4=0.9990,日内和日间的精密度分别为RSD<2.3%(n=6),RSD<3.15%(n=5)。结果表明本实验所得的色谱条件较文献报道的优越,分离条件简单,重现性好。HPLC-CMP法测定甲状腺素对映体其意义在于该方法可为定量测定药品及人体血液中D-,L-T4两种异构体,为治疗药物监测(TDM)和药物不良反应监测(ADRs)提供了依据。 相似文献
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线性迭代法同时测定小儿退热灵片中乙酰水杨酸和苯巴比妥的含量 总被引:1,自引:1,他引:0
本文利用线性迭代法同时测定了小儿退热灵片中乙酰水扬酸和苯巴比妥的含量。乙酰水杨酸的回收率为99.6%(RSD=0.58%,n=6),苯巴比妥的回收率为100.4%(RSD=1.66%,n=6)。本法测定结果与黑龙江省药品标准方法测定结果基本一致,本法简单,快速,适合该剂剂中两组份的同时测定。 相似文献
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四甲基双硅桥联环戊二烯基钠与无水三氯化稀土在THF溶剂中反应合成了标题配合物Me1Si2(C5H4)2LnCl[Ln:3Nd,4Sm,5Gd,6Y]和配合物Me4Si2(C5H4):Ln(C5H5)(THF)n[Ln:1La,n=1;2Pr,n=0]。通过元素分析、1HNMR、13CNMR和MS确证了配合物的结构,在THF溶液中重结晶获得配合物4的单晶,x射线衍射证明晶体结构为二聚体,4为单斜晶系,空间群为P21/c,晶体学数据a=1.2982(3)nm,b=1.2269(3)nm,c=1.3681(2)nm,β=96.79(2)°,V=2.162(1)nm3,Z=2,Dx=1.53g/cm3,偏差因子R=0.068。 相似文献
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通过SnCl_2对化合物Me_2Si[η~5-C_5H_4Fe(CO)]_2(μ-CO)_2(Ⅰ)中Fe-Fe键的插入反应以及Ⅰ被Na-Hg齐还原所生成的相应双铁负离子{Me_2Si[η~5-C_5H_4Fe(CO)_2]_2}~(2-)与SnR_2Cl_2(R=Me,Ph)的亲核反应,合成了环状化合物Me_2Si[η~5-C_5H_4Fe(CO)_2]_2SnR_2[R=Cl(1),Me(2),Ph(3)]。以元素分析、IR和~1HNMR谱表征了它们的结构,并用X射线衍射测定了配合物3的晶体结构。3为单斜晶系,空间群P2_1/n,a=1.0384(3)nm,b=1.6384(1)nm,c=1.5762(5)nm,β=97.93(2)°,V=2.656(2)nm~3,Z=4,Dx=1.71g/mL。 相似文献
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离子对高效液相色谱法分析注射用新灭菌 总被引:1,自引:1,他引:1
建立了离子对高效液相色谱法分离与测定复方制剂(新灭菌)中的羟氨苄青霉素及氟氯青霉素含量法。采用C8.10μm,4.6×200mm柱(大连化物所Spherisorb),以含1.4%十六烷基三甲基溴化铵的pH6.5磷酸盐缓冲液-乙腈(68+32)为流动相,在紫外检测器254nm波长处检测,线性范围为0.25~2mg/mL,r=0.9999(n=5),羟氨苄青霉素及氟氯青霉素平均回收率分别为99.5%及100.7%(n=5)。精密度:羟氨苄青霉素及氟氯青霉素日内(4h)平均RSD(相对标准偏差)均为0.8%(n=15),日间(2h)平均RSD分别为0.6%和0.7%(n=3)。 相似文献
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复方制剂中诺氟沙星的 HPLC法测定 总被引:3,自引:0,他引:3
采用Kromasil C18为分析柱、0.01mol/L磷酸二氢钠液-甲醇(体积比67:33,用磷酸调pH2.4)为流动相、272nm为检测波长,以HPLC外标法测定复方制剂中诺氟沙星的含量。该法能很好地分离测组分和有关杂质,被测组分的线性关系良好,回收率令人满意。该法专属性好,快速、准确。 相似文献
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诺氟沙星的交流示波极谱滴定法研究 总被引:1,自引:2,他引:1
本文报道了示波极谱滴定法测定诺氟沙星的含量。用PH4.4的HAc-NaAc缓冲溶液溶解药样,并与过量的四苯硼钠作用生成沉淀。过滤后,用硫酸亚铊回滴过量的Na-TPB,由示波极谱图[dE/dt=f(E)]上TPB切口的消失指示滴定络点,进而在该溶液中进行空白实验。 相似文献
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电子受体与诺氟沙星的电荷转移反应 总被引:7,自引:1,他引:7
本文研究了电子受体对苯醌、2,3-二氰-5,6-二氯-1,4-对苯醌、四氯对苯醌和四溴对苯酯与诺氟沙星[1-乙基-6氟-1,4-二氢-1,4-二氢-4-氧人-7-(1-哌嗪基)喹啉-3-羧酸]电子给体之间的荷移反应。 相似文献
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《Analytical letters》2012,45(12):2074-2084
A flow-based methodology for the spectrophotometric determination of ciprofloxacin and norfloxacin, based on the oxidation with N-bromosuccinimide in acidic medium, was developed. The proposed procedure was implemented in a multi-pumping flow system, which provided excellent mixing conditions due to the pulsed flow produced by solenoid micro-pumps actuation, resulting on a sensitive, simple, fast, and versatile analytical method. Linear calibration plots were obtained for ciprofloxacin and norfloxacin concentrations ranging from 5 to 70 mg L?1 with an R.S.D < 2.2% (n = 10). Detection limits (3σ) were 0.27 mg L?1 and 0.99 mg L?1 for norfloxacin and ciprofloxacin, respectively. 相似文献
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Direct determination of four fluoroquinolones,enoxacin, norfloxacin,ofloxacin, and ciprofloxacin,in pharmaceuticals and blood serum by HPLC 总被引:7,自引:0,他引:7
Samanidou VF Demetriou CE Papadoyannis IN 《Analytical and bioanalytical chemistry》2003,375(5):623-629
A rapid, accurate and sensitive method has been developed for the quantitative determination of four fluoroquinolone antimicrobial agents, enoxacin, norfloxacin, ofloxacin and ciprofloxacin, with high in-vitro activity against a wide range of Gram-negative and Gram-positive organisms.A Kromasil 100 C(8) 250 mm x 4 mm, 5 microm analytical column was used with an eluting system consisting of a mixture of CH(3)CN-CH(3)OH-citric acid 0.4 mol L(-1) (7:15:78 %, v/v). Detection was performed with a variable wavelength UV-visible detector at 275 nm resulting in limits of detection: 0.02 ng per 20 microL injection for enoxacin and 0.01 ng for ofloxacin, norfloxacin and ciprofloxacin. Hydrochlorothiazide (HCT) was used as internal standard at a concentration of 2 ng microL(-1). A rectilinear relationship was observed up to 2 ng microL(-1) for enoxacin, 12 ng microL(-1) for ofloxacin, 3 ng microL(-1) for norfloxacin, and 5 ng microL(-1) for ciprofloxacin. Separation was achieved within 10 min. The statistical evaluation of the method was examined by performing intra-day (n=8) and inter-day precision assays (n=8) and was found to be satisfactory with high accuracy and precision. The method was applied to the direct determination of the four fluoroquinolones in human blood serum. Sample pretreatment involved only protein precipitation with acetonitrile. Recovery of analytes in spiked samples was 97+/-6% over the range 0.1-0.5 ng microL(-1). 相似文献
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A new molecular imprinting-chemiluminescence method for the determination of trimethoprim was developed, in which trimethoprim-imprinted polymer was used as the molecular recognition material and the CL reaction of trimethoprim with potassium permanganate in acidic medium was used as the detection system. The CL intensity responds linearly to the concentration of trimethoprim within the 5.0 x 10(-8)-5.0 x 10(-6) g mL(-1) range (r= 0.9983) with a detection limit of 2 x 10(-8) g mL(-1). The relative standard deviation for the determination of 1.0 x 10(-7) g mL(-1) trimethoprim solutions is 4.8% (n= 9). The method has been applied to the determination of trimethoprim in pharmaceutical preparations and body fluids, and satisfactory results were obtained. 相似文献