样品

A gas chromatographic method to determine the conversion of asymmetric hydrosilylation of acetophenone has been established.

建立了由气相色谱法测定苯乙酮不对称硅氢化反应转化率的定量方法，操作简便、迅速，重复性和精密度较好，多个样品各重复6次的变异系数均小于1％，且结果与1HNMR法测定结果一致。

In the domestic coffee bean sample, the higher roasting terminal temperature, the higher pH value, and the content of organic acid will drop with rising of temperature.

中文摘要在国产咖啡豆样品中，烘焙终点温度愈高，则取样调配所得咖啡之中pH值即愈高，且有机酸含量会随著温度的上升而下降。

2 The analysis step by 25.0mL sample lixivium, moved in the direction of arsenic in the bottle, plus 10 ml of hydrochloric acid and 10 ml of potassium iodide solution and 5 drop acid stannochlor solution, shake the place 10min, together with 2 g of arsenic-free zinc metal, immediately mounted a good lead acetate paper turns red cotton and mercury bromide from log that arsenic tube placed in the 25-38, f μh of the dark side, remove the test strip and standard mercury bromide a color not deeper than standard.

7.2 分析步骤取25.0mL样品浸泡液，移入测砷瓶中，加5mL盐酸、5mL碘化钾溶液及5滴酸性氯化亚锡溶液，摇匀后放置10min，加2g无砷金属锌，立即将已装好乙酸铅棉花及溴化汞试纸的测砷管装上，放置于25～30℃的暗处1h，取出溴化汞试纸和标准比较，其色斑不得深于标准。

The method is simple with good accuracy and precision, and it can measure two kinds of material quickly and simultaneously. The method can be used for detection of saccharin sodium and benzoic acid in a large number of food samples.

该方法操作简便，可同时快速测定2种物质，具有良好的准确性和精密度，可应用于大量食品样品中糖精钠和苯甲酸的检测工作。

The results suggested that all ore rock samples have potential to generate acid. So effective measures are expected to be taken to prevent acid rock drainage generating.

研究结果表明，所有的矿石样品都具有产酸潜力，需要对矿石进行有效的防控，以阻止酸性岩排水的产生。

The acidophile s composition and community structure in the sediment was studied with 16S rDNA clone library and denaturing gradient gel electrophoresis.

采集了酸性矿山废水区域酸性沉积物样品，运用16S rDNA克隆文库技术和变性梯度凝胶电泳技术，研究了沉积物中的嗜酸菌类群以及它们的群落结构。

Water-based ink system deoxypentose characteristic、 it is mixed, acidproof anti－alkali, the size of the expansion rate, and so on to after the ceramics firing on the decoration of the differences in graphics and text to the sample.

火性不朱编制介质的不合子不解构共性、是否便当搀和、耐酸耐碱性、伸缩率不小小等等都潮系到烧不败之后陶瓷上表现不入的点缀图文与样品的不对别。

Results 12 samples of five aconitum plants were analyzed successfully.

结果该方法可成功应用于5种乌头属植物12个样品中生物碱成分分析。

The method was applied to the analysis of 14 samples of various species of Aconitum plants and 10 different proprietary medicine samples

此法亦应用于14个不同的乌头属药材及10个不同的中成药样品中的乌头硷含量检测。

An expression for acoustic wave amplitude as a function of modulation frequency and relaxation time has been derived.

推导了光声信号振幅与入射光调制频率和样品分子振动－平动弛豫时间的函数关系。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。