共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
乙酰化气相色谱法快速测定皮革及皮革制品中的五氯苯酚残留量 总被引:4,自引:0,他引:4
在前人工作基础上,对皮革及皮革制品中五氯苯酚残留测定方法经试验改进,增加浓硫酸净化步骤,并以艾氏剂作为标物,乙酰五氯苯酚用填充气相色谱测定。 相似文献
3.
《液相色谱法及相关技术杂志》2012,35(16):3415-3421
Abstract A densitometric TLC method was developed for the quantification of allantoin in creams and suppositories used to treat vaginal infections. Allantoin was extracted with water at elevated temperature, diluted to a known volume, and separated by HP silica gel TLC. Allantoin was detected by spraying with p-dimethylamine-benzaldehyde reagent. The absorption of standards and samples was compared by in situ scanning. Recoveries of allantoin from authentic samples ranged from 96–102%, except for one sample that assayed high. The accuracy of the method was demonstrated by standard addition analysis of this sample. 相似文献
4.
5.
6.
7.
《液相色谱法及相关技术杂志》2012,35(9):1861-1868
Abstract A densitometric TLC method was developed for quantification of sulfanilamide and sulfisoxazole in creams, supppositories, and tablets. The sulfas were extracted into acidic ethanol, diluted to an appropriate volume, and separated by silica gel HPTLC. The fluorescence quenching of the sulfa zones in samples and standards was compared by in situ scanning. Recoveries of the drugs from authentic samples ranged from 96–105%. Recoveries from products with old expiration dates were low. Identity of the sulfa drugs in products was confirmed by application of fluorescamine and Bratton-Marshall detection reagents. 相似文献
8.
呋喃丹的薄层扫描定量分析研究 总被引:1,自引:0,他引:1
采用双波长反射吸收薄层扫描法对呋喃丹进行了定量分析方法的研究。方法的线性范围为2~200μg,线性相关系数为0.997;呋喃丹的检出限为0.3μg,回收率为96.94%~100.38%,相对标准偏差为1.73%。本方法快速、简单、易行。 相似文献
9.
《液相色谱法及相关技术杂志》2012,35(10):1983-1989
Abstract A simple, rapid, and sensitive method for the determination of sarafloxacin (A-55620) in fish serum using enrofloxacin as internal standard is described. The serum sample and internal standard enrofloxacin are loaded onto the extraction column packed with C2 sorbent material. The column is rinsed and then eluted. The detection limit is 5 ng/g, the recovery rate varying from 92 to 100 % . 相似文献
10.
11.
12.
JPC – Journal of Planar Chromatography – Modern TLC - The Eurachem/Citac Guide on measurement uncertainty establishes general rules for evaluating and expressing measure¬ment... 相似文献
13.
固相微萃取-气相色谱法测定鱼肉中五氯酚 总被引:1,自引:0,他引:1
经匀浆的鱼肉样品置于20 mL顶空瓶中,加入氯化钠3.0 g,水1 mL及pH 2.0硫酸溶液9 mL,于40℃超声萃取30 min。将顶空瓶放入带固相微萃取装置的Combi PAL全自动进样器中,于90℃温度下加热20 min后,用85μm聚丙烯酸酯萃取头固相微萃取10 min,于280℃热解3 min,用HP-5毛细管柱分离后,用气相色谱法(电子捕获检测器)测定五氯酚的含量。五氯酚的线性范围在0.05~100μg.L-1之间,方法的检出限(3S/N)为0.02μg.L-1。在3个浓度水平(1.0,5.0,50.0μg.kg-1)上对方法的回收率进行试验,测得回收率在81.2%~89.4%之间,测定值的相对标准偏差(n=6)在4.2%~7.1%之间。 相似文献
14.
五氯苯酚测定方法研究进展 总被引:4,自引:0,他引:4
介绍了目前国内五氯苯酚常用的分析方法,对每种分析方法的原理、操作条件、检测限、线性范围及应用对象作了较为详细的论述.指出吸光光度法操作简单,仪器比较普及,但五氯苯酚吸收带较宽,分辨率低,共存有机物影响较大,其应用受到限制.高效液相色谱法样品无需气化,也不需衍生化,是高沸点、热稳定性较差的五氯苯酚较理想的分析方法.乙酰衍生化、毛细管柱分离、电子俘获检测器检测是目前测定五氯苯酚最常用的气相色谱法.吹扫捕集技术、固相微萃取技术以及质谱检测技术在气相色谱分析中的应用有效提高了测定五氯苯酚的准确度和灵敏度.离子选择性电极法测五氯苯酚仍处于研究阶段. 相似文献
15.
《Analytical letters》2012,45(9):2059-2064
Abstract Peroxyoxalate chemiluminescence is used for the determination of pentachlorophenol and 1-naphthol in soil. 1-Naphthol is brominated to make it amenable to the procedure. Calibration curves are linear over concentration ranges spanning four orders of magnitude and limits of detection are at the micromolar level. the processes can be carried out in the soil without prior extraction of the analytes. 相似文献
16.
17.
《液相色谱法及相关技术杂志》2012,35(5):785-790
Abstract Pentachlorophenol Laurate (PCPL) in canvas is determined by extraction and chromotography on silica gel. Conditions are chosen to eliminate peak splitting due to the presence of different “laurate” fatty acids. The determination is faster and more specific than previously reported methods. 相似文献
18.
Salama Nahla Nour El-Din Ahmed El Ries Mohammed A. Toubar Safaa Hamide Maha Abdel Walash Mohammed I. 《平面色谱法杂志一现代薄层色谱法》2012,25(1):65-71
JPC – Journal of Planar Chromatography – Modern TLC - Two stability-indicating chromatographic methods were developed for the analysis of dapsone in presence of its oxidative... 相似文献
19.
20.
JPC – Journal of Planar Chromatography – Modern TLC - Experiments and calculations show the importance of analytical management to reliable analytical results. A method with a... 相似文献