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In this paper, the determination of trace elements including copper, manganese,cobalt, nikel and chromium in lead metasilicate by atomic absorption spectroscopyhas been investigated.

本文提出用火焰原子吸收分光光度法测定硅酸铅中的微量元素铜、锰、钴、镍和铬,并探索了样品中可能存在的干扰元素及溶剂介质酸度对测定的影响。

E. , methine carbons were spit into the two components with inclusion of PVP to system. The above observation were responsible for the formation of intermolecular hydrogen bonding interactions. The proton spin-lattice relaxation time T〓, T〓 in the laboratory and the rotating frame were measure as a function of the blend composition. In view of the relaxation parameters, it is concluded that the Phenoxy and PVP chain are intimately mixed on the scale of 20-30A.

采用反转-回复法,我们测定该体系的T〓,T〓值的测定进一步支持,根据Tg判断的相容性。T〓ρ的研究结果表明,该体系在分子水平上是相容的,根据自旋扩散过程,估算该体系的相容性尺度为20-30〓,实验的1/T〓ρ组成关系同理论的线性关系比较呈负偏差,表明共混改变了组分在体系中的混合状态。

In this paper,a series of parameters as aperture、surface-area ratio to particle mass、hole-volume of pyrite (FeS2) particle,and the release characteristic of sulfur before reaction and under different temperature of drop-tube furnace were measured using ASAP2000 instrument from Micromeritics Co. USA with isothermal-absorption method. The configuration of FeS2 and its reaction products were summarized from the experiments.

采用美国Micromeritics公司的ASAP2000型比表面孔容测定仪,用等温吸附法,对硫铁矿(FeS2)在反应前及一维沉降管炉不同炉温条件下的孔径、比表面积和孔容积等参数的变化特性及硫的释出规律进行了测定,得到了对FeS2及其反应产物形态的一定认识。

Objective To evaluate diagnostic value of anti-deoxyribonuclease B microtitration test in rheumatic fever. Methods Anti-DNase B antibodies of 87 patients with acute rheumatic fever and 202 rheumatic heart disease patients with rheumatic activity were detected with anti-DNase B antibody microtitration test,and compared with antistreptolysin "O" test.

目的 评估A组溶血性链球菌感染的血清学测定方法对诊断风湿热的临床价值方法采用抗DNA酶B微量法和自制试剂测定急性风湿热87例、活动期风湿性心脏病202例病人血清的抗DNA酶B抗体,与抗溶血素O抗体对照研究。

Molysite is introduced into releasing agent and with the increasing sensitivity of molysite ,a method for determination of ultra trace gold in rock samples by graphite furnace atomic absorption spectrometry is introduced.

在解脱测定液中引入三价铁盐,并在其增敏下,使用石墨炉原子吸收法测定岩石样品中的超痕量金。

MethodsAfter the conversion coefficient of Moringa oleifera polysaccharides to glucose was obtained, contents were determined by anthrone-H2SO4 colorimetry.

采用精制辣木叶多糖测得辣木叶多糖对葡萄糖的换算因子后,采用蒽酮-硫酸比色法测定,测定波长为620 nm。

Objective: Choosing experimental conditions of the determination of microscopic characteristic constants of Cortex Moutan by homogeneous experimental design and measuring the microscopic characteristic constants of Cortex Moutan from different areas and classes.

目的:采用均匀设计法确定牡丹皮显微常数测定的实验条件,对不同产地、不同等级的牡丹皮进行显微特征常数的测定。

The morphologic changes of these three tissues were observed with light microscope and transmission electronic microscope; the pulmonary wet-to-dry weight ratio, the pulmonary weight indexs, and the ratio of the area of the multilamellar body to the area of cytoplasm in type II alveolar cell were measured. Results 1.The permeability of the pulmonary endothelial cells increased 2 hours after the injection of oleic acid.

经光镜和透射电镜观察对照组和实验组三种组织的形态学改变;并测定肺组织的湿干重比和肺系数;采用立体计量法测定肺II型细胞板层小体与细胞质面密度比。

Based on the remarkable sensitivity enhancement effect of Co~(2+) on Cd,a new chemical vapor generation system of Cd-KBH_(4)-NaIO_(3)-HCl was developed for the determination of trace Cd in foodstuff samples by atomic fluorescence spectrometry.

利用Co2+对镉的测定具有明显的增敏作用,采用Cd-KBH4-NaIO3-HC l新化学蒸气发生体系原子荧光光谱法测定粮食中痕量镉。

Methods According to Chinese standard analysis method of foods (GB/T 5009133-2003), 108 samples of cured meat products were determined nitrite content by naphthyl ethylenediamine hydrochloride colorimetry. The results were analyzed.

采用国家食品卫生检验标准方法(GB/T 5009133-2003)即食品中亚硝酸盐与硝酸盐的盐酸蔡乙二胺比色法对市场上抽检108份腌腊制品中亚硝酸盐含量进行测定,对测定结果进行分析。

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