标准测定

The contents of exceedingly weak diabasic alkalies such as sodium DL Hydroxy Succinic acid , sodium citric acid and sodium adipic acid were detected by using the standard curve method.

用标准曲线法测定了极弱二元碱：苹果酸钠、酒石酸钠、柠檬酸钠的含量。

Results: Recoveries over 90%,the relative standard deviation of sample (n=6) was 1.8% for dichloroacetic acid and 1.9% for trichloroacetic acid and the detection limit was 0.83 μg/L and 0.4 μg/L respectively.

结果：本法的加标回收率在90%以上，6份平行样品测定的相对标准偏差二氯乙酸为1.8%，三氯乙酸为1.9%，检出限依次为0.83μg/L和0.4μg/L。

Objective: To develop a RP-HPLC method for simultaneous determination of three active compounds, dictamnine, obacunone and fraxinellone in root bark of Dictamnus dasycarpus and supply a reference for the establishment of the quality standard of D.

中文摘要：目的：建立同时测定白鲜皮中白鲜碱、黄柏酮和梣酮含量的反相高效液相色谱法，为中药白鲜皮标准的制定提供依据。

There is an important theoretical and practical sense in testing the diphase relative permeability curve of the equilibrium of oil and gas under the conditions of high temperature and pressure.

相渗曲线是描述油气藏渗流中一个非常重要的参数，标准的测定方法是在室温低压下采用模拟油模拟气来进行测试，未考虑地下高温高压及平衡油气渗流的实际情况。

Nitrate contents of main vegetables and fruits in Yaan city's markets were determined by disulfonic acid colorimetry method. Nitrate pollution levels were evaluated by evaluation criteria of nitrate content classification in China.

方法］采用酚二磺酸比色法对雅安市城区市售主要蔬菜和水果硝酸盐含量进行了测定，并参照我国硝酸盐含量分级评价标准对其硝酸盐污染状况进行了评价。

The comparison analysis of nitrate nitrogen determination is conducted with the same standard solution and natural water samples by two methods of spectrophotometric method with phenol disulfonic acid and ultraviolet spectrophotometer.

采用同一标准液和天然水样用酚二磺酸光度法和紫外分光光度法测定硝酸盐氮，进行比对分析，同时调查云南省内用此两种方法密码样考核的情况。

Methods The study population consisted of 180 pairs of twin girls aged 6 to 18 of whom.132 pairs monozygotic twins and 48 pairs dizygotic twins,who were all from Qingdao city of Shandong province.

以学校登记为基础募集6～18岁女性双生子180对，其中同卵双生子132对，异卵双生子48对，按Tanner标准进行青春发育分期，放免法测定空腹血清雌二醇(E2)和睾酮浓度。

The method is simple and rapid, and it has been applied to the determination of benzaldehyde and benzoic acid in electrosynthetic samples with satisfactory results. The recovery was between 91.9% to 106.5% and 95.8% to 99.2% respectively, and the relative standard deviation was less than 0.15% and 0.92%, respectively.

本法简便、快速，应用干多个电合成产品中苯甲醛和苯甲酸含量的测定，均获得比较满意的结果，其加标回收率分别在91.9%-106.5%和95.8%-99.2%之间，相对标准偏差分别小于0.15%和0.92%。

Methods: 40 isolates of dermatophytes belonging to the species Trichophyton rubrum,Trichophyton mentagrophytes,Microsporum canis and Epidermophyton floccosum were tested using the two different methods.

分别用Rosco纸片扩散法及天津金章真菌药敏试剂盒参考美国国家实验室标准委员会(NCCLS推荐的M38—P方案修改方案测定这些菌对两性霉素B、伊曲康唑、氟康唑、特比奈芬等几种常用的系统性抗真菌药物的敏感性。

The contents and distributions of heavy metals in muscle,fat,liver,pancreas,heart,lung,kidney,stomach and intestines of finless porpoise in the coast of Beibu Gulf were investigated.

应用原子吸收分光光度计对北部湾海域江豚的肌肉、脂肪、肝脏、胰脏、心脏、肺脏、肾脏、胃和肠管道等器官组织样品中的Cd、Cu、Zn、Pb、Cr、Ni、Fe、Mn、Hg和As的含量进行测定，并使用标准物作了对照分析。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。