共查询到20条相似文献,搜索用时 109 毫秒
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采用高效液相色谱,以甲醇+水(68+32)作流动相,外标法测定双氧威原药。方法的标准偏差为049,变异系数为05%,回收率在991%~101.0%之间。 相似文献
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石灰法处理磷化废水工程实践 总被引:13,自引:3,他引:10
介绍了用石灰法处理磷化废水的工程实践,在进水磷酸盐273~487mg/L,Zn2+200mg/L左右时,处理出水磷酸盐:0025~0081mg/L,Zn2+:036~114mg/L,去除率分别为996%~999%和9384%~9731% 相似文献
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本文建立了同柱分离测定异丙甲草胺和草酮的大口径毛细管柱气相色谱法,使用中等极性的农残Ⅱ25米×053毫米(内径)大口径石英毛细管柱和FID检测器,方法简便、准确,线性相关性好。变异系数和回收率:异丙甲草胺074%,992~1009%;草酮037%,994~1007%。 相似文献
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采用NOVa-pakC18色谱柱,以苯甲酸异戊酯为内标物对辛·硫丹混剂有效成分辛硫磷、硫丹含量进行高效液相色谱分析,辛硫磷、硫丹变异系数分别为042%和114%;线性相关系数分别为09998和09996;回收率分别为997%~1004%和991%~998%。 相似文献
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介绍了嘧啶磷气相色谱分析方法, 其中间体羟基嘧啶通过转化成易挥发的三甲基硅醚进行气相色谱分离和测定。方法的变异系数分别为06 % , 06 % ; 回收率分别为990 % ~1004 % ,982 % ~1008 % 。 相似文献
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HPLC法定量分析30%克·多·福大豆种衣剂 总被引:2,自引:1,他引:1
报道了30%克·多·福大豆种衣剂的高效液相色谱分析方法,本方法采用异丙醇—水(每1000ml水+2ml氨水)为流动相,以200mm×40mm(id)不锈钢柱,内装Nova-pakC18填充物(5μm),在210nm波长下进行测定。方法回收率克百威、多菌灵、福美双均在98%~102%之间,标准偏差分别为024,013和020,变异系数分别为16%,26%和20%。 相似文献
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选用反相高效液相色谱法,在C18反相柱上,以甲醇/pH3.0水(65/35v/v)为流动相,以邻苯二甲酸二乙酯为内标物,对快杀稗进行定量分析。9次测定结果,其平均值为88.74%,相对偏差为0.37%,变异系数为0.63%,平均回收率为99.1%~101.9%,线性相关系数为0.99997。 相似文献
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本文采用高效液相色谱法,以甲醇+水=10+90(V/V)为流动相测定了咪唑烷的含量,该法标准偏差为0.36,变异系数为0.37%,回收率为99.49%~100.34%,线性相关系数为0.9999。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献