共查询到20条相似文献,搜索用时 93 毫秒
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建立了大鼠血浆中河豚毒素(TTX)反相离子对高效液相色谱测定方法。血浆样品加水涡漩,再加沉淀剂V(乙腈)∶V(含0.5%HAc的甲醇液)=3∶1),旋涡离心后取上清液进样测定。色谱柱为Agilent ZorbaxSB C18柱(150 mm×4.6 mm×5μm);流动相为10?N-90%的8 mmol/L庚烷磺酸钠与0.005%TFA混合溶液,配好后调到pH5.0;紫外检测波长196 nm;流速1.0 mL/min;柱温为室温。本方法TTX标准品检出限为1.055 mg/L,血浆中TTX的检出限为0.1055 mg/L。血浆中TTX的线性范围为21.1~211 mg/L,r=0.9989。日内和日间精密度RSD均小于3%。本方该法准确、专属性强,适用于血浆中TTX的浓度测定。 相似文献
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反相离子对高效液相色谱法测定微量碘的研究 总被引:6,自引:0,他引:6
建立了一种反相离子对高效液相色谱测定微量碘的新方法。采用WatersSpherisorbODS2(5μm ,4.6mmi.d.×250mm)色谱柱 ,以甲醇 -水 (体积比为30∶70)作为流动相 ,四丁基溴化铵 (TBA·Br)作离子对试剂 ,流速为1.0mL/min,在223nm处检测 ,将I- 与在紫外区有吸收的共存离子完全分离。I- 的质量浓度在0.20~180μg/mL范围内 ,峰面积Y与质量浓度X(μg/mL)呈良好的线性关系 ,r=0.9997 ,I -的检出限为53.2μg/L。该方法已用于海水和海带、紫菜等食品中碘含量的测定 ,加标回收率为98%~101 % ,相对标准偏差为1.04 %~3.01 %。 相似文献
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反相高效液相色谱法测定碘 总被引:4,自引:0,他引:4
建立了碘的反相高效液相色谱测定方法。色谱条件为:Shim-pack CLC-ODS柱;流动相为甲醇-水(20:80);流速为1mL/min;检测波长为290nm。本方法的线性范围为0.10 ̄10mg/L;相对标准偏差为1.1% ̄1.4%;加标回收率为97% ̄101%。所建立的方法已用于医用碘酒的测定。 相似文献
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R J Bushway H L Hurst J Kugabalasooriar L B Perkins 《Journal of chromatography. A》1991,587(2):321-324
A fluorescent reversed-phase high-performance liquid chromatographic method was developed for the analysis of carbendazim in blueberries. Recoveries of fortified blueberries at 27 and 810 ng/g were more than adequate with good precision. Forty commercial blueberry samples were analyzed and the amount of carbendazim ranged from none detected (detection limit of 15 ng/g) to 155 ng/g. Confirmation of carbendazim in the blueberry samples was made by enzyme immunoassay and UV photodiode array. 相似文献
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Hamdan Al-Ebaisat 《Arabian Journal of Chemistry》2011,4(1):115-117
High performance liquid chromatography (HPLC) coupled with solid phase extraction (SPE) was optimized for extraction and quantification of two benzimidazoles fungicides (carbendazim and benomyl) in tomato puree. Results indicate that HPLC using an Agilent ZORBAX Eclipse plus C18 column (4.5 mm × 100 mm, 3.5 μm) and SPE using Agilent SampliQ SCX (55 mg, 3 mL) is an excellent combination for extraction and analysis of these compounds. Recoveries ranged from 90.0 to 95.5 percent with RSDs below 5 percent and limit of detections of 5 μg/kg. 相似文献
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《Journal of separation science》2003,26(8):722-726
A new method is described for the determination of famotidine by solid phase extraction from alkalinized human plasma followed by reversed phase (RP) HPLC in acetonitrile/alkaline buffer with molsidomine as an internal standard. Different acetonitrile/aqueous buffer mobile phases as well as various RP columns were used. Alkaline medium allowed the limit of quantitation to be lowered to 5 ng/mL of plasma as the famotidine gives more intense absorption at about 286 nm (at pH values higher than 7). Moreover, work in alkaline media and at this wavelength is highly selective as peaks corresponding to impurities present in most samples are well separated. A method using a mildly alkaline mobile phase (acetonitrile/10 mM phosphate with 10 mM 1‐heptanesulphonic acid, pH 7.5) was successfully used for determination of famotidine in human plasma in a pharmacokinetic study. 相似文献
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利用高效液相色谱仪-电子捕获检测器(HPLC-ECD)测定了市售片剂硫酸沙丁胺醇的含量.结果表明,利用HPLC-ECD技术测定硫酸沙丁胺醇的线性范围为0.944~33.8mg·L-1(r=0.999 6);回收率为99.0%~107.8%(RSD≤4.6%).该法可用于测定片剂的硫酸沙丁胺含量. 相似文献
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建立了高效液相色谱-荧光法同时测定11种氟喹诺酮类药物的分析方法.主要研究了流动相、流动相配比及流动相的pH对氟喹诺酮分离的影响.确定了液相色谱分析最佳条件.分离条件为:Xbridge Shield RP C18柱,以V(0.10%三氟乙酸)∶V(乙腈)∶V(甲醇)=89∶4∶7为流动相;检测波长为λex=280 nm和λem=450 nm.方法检出限为:诺氟沙星、环丙沙星、培氟沙星和恩诺沙星0.007μg/mL,单诺沙星0.002 μg/mL,沙拉沙星和氧氟沙星为0.04 μg/mL,二氟沙星和奥比沙星为0.02 μg/mL,依诺沙星、麻保沙星为0.4 μg/mL,各组分回收率在97%~100.2%,相对标准偏差为0.2%~2.9%. 相似文献