查询词典 fluorine

All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on th...

本法用硝酸铁为标准液，水杨酸钠作指示剂，在 pH=3左右作滴定；当溶液呈橙黄色时，加入适量的乙醇，使其浓度在终点时仍不低于50%。

All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the r...

本法用硝酸铁为标准液，水杨酸钠作指示剂，在 pH=3左右作滴定；当溶液呈橙黄色时，加入适量的乙醇，使其浓度在终点时仍不低于50%。

All of the methods,published by Guyot,Greeff,Fairchild andVisintin proposed for the determination of fluorine using ferric solutionas standard,are based on the reac...

本法用硝酸铁为标准液，水杨酸钠作指示剂，在 pH=3左右作滴定；当溶液呈橙黄色时，加入适量的乙醇，使其浓度在终点时仍不低于50%。

Preparation of a high-strength α-hemihydrate gypsum based on complex pastern material is studied by using a complex active agent of industrial waste to improve the crystal properties of hemihydrate gypsum and to eliminate impurities' effect on the properties of products of phosphorous gypsum ,such as phosphorous and fluorine.

以磷石膏为基体原料制备高强α-半水石膏基复合材料，利用工业废渣中的激发剂来改进半水石膏的结晶性质，以消除磷石膏中磷、氟等杂质对磷石膏制品性能影响，同时激发剂使具有潜在活性的矿渣得以活化，制备的低温陶瓷化磷石膏基复合材料制品兼具陶瓷和石膏性能；SEM图片表明，制备的复合材料水化后晶体结构粗大、致密

The high content of fluorine is closely related to the mixed-layer minerals of illite and smectite, apatite, hornblende, and K-feldspar.

拌煤黏土中高含量的氟主要与伊蒙混层矿物、磷灰石、角闪石和钾长石等密切相关。

This paper also shows the distribution of the fluorine in sediments of the area is mainly controlled by the chemical composition of the material from the surrounding islands, and the element seems to be incorporated by the hornblende at the most extent, thus the correlation between the element and the hornblende amount in the sediments can be expressed statistically as following: F=217+lnVh.

研究结果表明，测区沉积物中氟含量分布主要受周围岛屿风化基岩的化学成分制约；沉积物中主要含氟矿物：萤石/磷灰石、黄玉、黑云母等含量极低，氟在沉积物中赋存的矿物相主要与角闪石[AX_2Y_5Z_8O_(22)_2]有关。氟含量与碎屑矿物中角闪石的体积比间的关系式可大致表示为：氟含量=217+361nV_H；间隙水中的低氟主要由测区化学风化不发育及氟的钙盐沉积所致。

Thus, Chinese current standards include 12 heavy metals and harmful substances in apple, such as lead, cadmium, hydrargyrum, abio-arsenic, chrome, arsenic, selenium, copper, fluorine, rare earth, nitrite, nitrate, and also the residue limit of 56 pesticides.

至此，我国现行标准中，共包含了苹果中铅、镉、汞、无机砷、铬、砷、硒、铜、氟、稀土、亚硝酸盐、硝酸盐等12种重金属和有害物质以及56种农药的残留限量。

Safety and quality for agricultural product safety demand for non-environmental pollution fruit (GB 18406.2-2001) prescribes eight heavy metals and harmful substances in apple, such as arsenic, hydrargyrum, lead, cadmium, chrome, fluorine, nitrite, nitrate and also the residue limit of 22 pesticides.

另外，发布实施的《食品中污染物限量》(GB 2762-2005)规定了苹果中铅、镉、汞、无机砷、铬、硒、氟和稀土等8种污染物的限量标准[1]；《食品中农药最大残留限量》(GB 2763-2005)规定了苹果中49种农药的残留限量[2]；《农产品安全质量无公害水果安全要求》(GB 18406.2-2001)规定了苹果中砷、汞、铅、镉、铬、氟、亚硝酸盐、硝酸盐等8种重金属和有害物质以及22种农药的残留限量[3]。

Systems that have been purged clean of the fluorine/nitrogen mixture still may contain hydrofluoric acid.

已经清除了氟/氮混合物的系统仍然可能还有氢氟酸。

Furthermore, the vertical ionization potential of the fluorine nitrate molecular was studied on the basis of the optimized geometry of the ground state.

此外， 在分子的基态几何构型下，设计并计算了相应阳离子的垂直离子势，对分子的光电子谱给出了详细的解释。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。