碘的

Result The result showed that the linear range was from 5-100 mg and average recovery was 102.91% by using iodometry.

结果］试验结果表明，用碘量法测定蔬菜中维生素C的含量，其线性范围为5~100mg，平均回收率在102.91%。

The content of two chlorine dioxide products was measured with " five-step iodometry " in laboratory in order to know the factors influencing the accuracy of measurement by this method and to improve it.

在实验室用"五步碘量法"测定两种二氧化氯产品含量，以了解影响该方法测定准确性的因素并进行改进。

The content of two chlorine dioxide products was measured with "five-step iodometry" in laboratory in order to know the factors influencing the accuracy of measurement by this method and to improve it.

提要： 在实验室用"王步碘量法"测定两种二氧化氯产品含量，以了解影响该方法测定准确性的因素并进行改进。

Results In measurement with improving five-step iodometry method,it was optimal that the total concentration of the oxides in the sample solution was 1000-3000 mg/L and the sample volume was 2-5 ml.

结果改进五步碘量法测定中，样品溶液中氧化性物质的总浓度在1000-3000mg/L，取样量为2-5ml为佳。

When the measured value greater than or equal to 5mg/100mg usually allows iodometry; When measured value is less than 5mg/100mg, the method used to ensure the accuracy of measurements.

当测定值大于或等于5mg/100mg时，通常允许用碘量法；当测定值小于5mg/100mg时，通常使用光度法，以保证测定结果的精度[1]。

The result shows that this is a easy-operating way with the fast determination and high accuracy. It is less disturbed, the changing of the colors is acuity and the end point is easily estimated. The result of this method is very much accurate than that in the iodometry. RSD%=0.3%, and R is between 97.56 % and 101.08%. The result, got according to this method, is much better by the students experiment.

实验表明，这种方法操作简单、测定快速、准确度高、干扰小且颜色变化敏锐，终点易于判断，测定结果的准确度远远高于间接碘量法，其相对标准偏差RSD%=0.3%，加标回收率为

Odoquinazolin-4(3H)-one,7-methyl-4(3H)-quinazolinone,7-bromoquinazolin-4(3H)-one were synthesized by using anthranilic acid、2-amino-5-nitrobenzoic acid、2-amino-4-nitrobenzoic acid,6-nitro--4(3H)-quinazoline-one、o-amino-terephthalic acid, 2-amino-4-hydroxy benzoic acid、2-amino-5-bromo-benzoic acid、2-amino-5-iodine acid,1、4-butynediol、L-glutamine、isatin anhydride、formamide as starting materials and utilizing microwave-assisted synthetic approach.

本文利用微波辅助合成的方法，以邻氨基苯甲酸、2-氨基-5-硝基苯甲酸、2-氨基-4-硝基苯甲酸、邻氨基对苯二甲酸、2-氨基-4-羟基苯甲酸、2-氨基-5-溴苯甲酸、2-氨基-5-碘苯甲酸、5-甲基-2-氨基苯甲酸等为原料与甲酰胺反应，以及以1，4-丁炔二醇、L-谷氨酰胺与靛红酸酐反应，共合成了13个喹唑啉酮衍生。。。

The optimal conditions of the process has been studied by Latin square experiments.

乙醇中采用银盐和碘化物制备碘化银纳米微粉，用拉丁方格实验法确定合成过程中的适宜条件。

For example, kelp iodine content for 17500 microgram / 100 grams, laver for 245 microgram / 100 grams.

例如，海带的碘含量为17500微克/100克，紫菜为245微克/100克。

Surface-modified lead iodide nanorods were synthesized by one-step room temperature solid-state reaction of lead nitrate with potassium iodide in the presence of a nonionic surfactant, polyethyl- ene glycol.

以硝酸铅和碘化钾为原料，在体系中添加表面活性剂聚乙二醇，采用一步室温固相化学反应制备出聚乙二醇表面修饰的碘化铅纳米棒，利用X射线衍射，红外光谱，透射电子显微镜，扫描电子显微镜，热分析和元素分析等手段对其进行了表征。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。