显色剂

In a medium with pH 9.0 DBQADHP reacts with cobalt to form a green complex,exhibiting maximum absorbance at 670 nm,and the molar absorptivity is 7.6×104 L·mol-1·cm-1. Beers law is obeyed for 0～6 μg of cabalt in 25 mL solution.

实验结果表明：在pH9.0的缓冲体系中，显色剂与钴发生灵敏显色反应，形成绿色配合物，其最大吸收波长位于670nm，表观摩尔吸光系数为7.6×104L·mol-1·cm-1，钴量在0～6μg/25mL范围内遵守比尔定律。

First production of 10,000 tons annual capacity reagent resin, 5,000 tons of activated reagent, cationic etherification agents and oil additives several major series, a number of brand products.

先生产年产10000吨树脂显色剂、5000吨活性白土显色剂、阳离子醚化剂和油品添加剂几大系列、多个品牌的产品。

Based on the colour reaction of copper with sulfocyanate and crystal violet, a new spectrphotometric method for determination of copper in the presence of β-cyclodextrin and arabic gum is proposed. The factors such as acidity, reagent dosage, influence of surfactant and coexisting ions on the reaction were discussed and the optimal conditions were investigated.

研究了在β-环糊精和阿拉伯树胶存在下，在硫酸介质中，硫氰酸盐－结晶紫与铜的显色反应，建立了光度法测定铜的新方法；讨论了酸度、显色剂用量、表面活性剂和共存离子的影响，确定了最佳实验条件。

The results showed that the stability was good and the absorbance fluctuates lisle at pH=3~4, the temperature was at 15~28℃, the chromogenic reagent was 2mL and the time of coloration was 20~40min.

结果表明：pH值在3~4之间，温度在15~25℃之间，显色剂用量为2mL，显色时间在20~40min，显色稳定，样品吸光度无明显变化，实验能达到较理想的效果。

The result of the experiment showed that the qualitative medium - speed filter paper can be used as the material of the nitrite - detecting paper: color developing reagent A containing 4 - aminobenzene sulfonamide and N - 1 naphthyl ethylenediamine hydrochloride, and mixtures of 1 : 1 naphthylamine solution and sulfanilic acid solution as color developing reagent.

实验结果表明：定性中速滤纸可以作为亚硝酸根试纸的材料；含有4-氨基苯磺酰胺和N-1-萘基乙二胺盐酸盐的显色剂A及含有1：1的α-萘胺溶液和对氨基苯磺酸溶液的显色剂B，按1：1混合后可以作为显色剂；通过应用实验表明，亚硝酸根试纸具有体积小、便于携带、检测方便、成本低廉等特点。

The highly sensitive chromogenic reaction of a ternary complex of 4-(2-benzothiazolylazo) pyrocatechol with Mo-, W-diphenyl guanidine and the application of partial least squares method in simultaneous spectrophotometric determination of trace Mo and W have been studied.

本文研究了新显色剂4-(2-苯并噻唑偶氮)邻苯二酚-Mo、W-二苯胍三元配合物的高灵敏显色反应以及偏最小二乘法在同时分光光度测定痕量钼和钨中的应用。

Using thymol -sodium hypobromite as chromogenic reagent,and extracting the colour formed with butanol,a spectrophotometric method for the determination of arginine in fermentation broth was studied.

以百里酚的次溴酸钠溶液为显色剂，用正丁醇萃取显色产物，以分光光度计比色测定有机相的吸光度值。

However, electron-withdrawing groups that have conjugative effect in molecule can increase complex ability, sensitivity and selectivity of fluorone reagents. From the experiment, it is clear that microemulsion media have more excellent solubilization and sensitization than micelle and water media.

而具有吸电子效应和共轭效应的基团，可以改变显色剂分子的电子云分布，使分子的共轭程度增大，使反应官能团羟基质子较容易离去，增加了显色剂与金属离子的成络能力，从而提高了试剂的灵敏度和选择性。

Methods 0mit and alter some work procedure including distillation,store reagent that show color,either the order of reagent procedure or recycle of the waste trichloromethane.

方法有条件的简化蒸馏步骤、显色剂储存使用、改变显色剂与氯仿的加入顺序、氯仿废液回收循环使用。

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法，以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂，质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别；并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。