D any food specified in column 1 of items 6 , 7 and 8 may have in it or on it disodium ethylene diamine tetraacetate as an alternative to calcium disodium ethylene diamine tetraacetate D第6 7及8项第1栏所指明的任何食物的里面及表面均可含有乙二胺四乙酸二钠以替代乙二胺四乙酸二钠钙。
The paper expounded theory , characteristics , using range and auxiliary reagent of hydrochloric acid , hydrofluoric acid , citric acid , edta and made simple introduction to their craft and use instances , when cleaning the boiler can take reference 摘要对盐酸、氢氟酸、柠檬酸、乙二胺四乙酸四种锅炉常用化学清洗剂的清洗原理、特点、使用范围，以及配套助剂进行详细的阐述，并对四种清洗剂的清洗工艺及应用实例进行了简单介绍，可在锅炉清洗时进行参考。
The high - efficiency cleaning agent and optimum conditions were chosen and it has some guiding significance on practice . the main tasks include : by the contrastive experiments of sodium tripolyhosphate , sodium hexametaphosphate , na2edta and na4edta dissolving caso4 , na2edta and n ^ edta were chosen as cleaning agents in this experiment 主要包括：通过对三聚磷酸钠、六偏磷酸钠、乙二胺四乙酸二钠、乙二胺四乙酸四钠四种螯合剂对硫酸钙溶解性对比实验，最终选择乙二胺四乙酸二钠和乙二酸四乙酸四钠作为本实验清洗剂。
Integrating the dissolving experiments of na2edta and na4edta and the orthogonal experiments , we can conclude that the dissolving property of na ^ edta is relatively more stable and higher than that of na2edta in this experiment . and , the conclusion can be made that for the caso4 scale in membrane na4edta has the best cleaning effect and the optimum condition is ph = 11 , operating pressure = 0 . 1mpa and concentration = 4 % wt 在综合考虑乙二胺四乙酸二钠和乙二胺四乙酸四钠对硫酸钙的溶解性实验及正交实验，和最后对污染膜清洗的正交实验可以看出，尽管最优工程选择中nazedta清洗后膜的相对恢复率略高于na4ed飞’ a ，但其要求条件相对苛刻，从溶解性实验也可看出， na4edrla对硫酸钙的溶解相对稳定，溶解率高。
The intermediate - temperature sofc ( solid oxide fuel cell ) ’ s electrolyte with perovskite - type lsgm ( la _ ( 0 . 9 ) sr _ ( 0 . 1 ) ga _ ( 0 . 8 ) mg _ ( 0 . 2 ) o _ ( 3 - ) ) was synthesized using advanced pechini method and solidification method . the thermal and electrical properties of the sintered samples ( synthesized by two different methods ) were measured and compared by thermal expansion and ac impedance spectroscopy ; the phase transformation process and inner structure were measured and compared by xrd , dta - tg and ac impedance spectroscopy . the research results show that the electrolyte synthesized by advanced pechini method has several advantages , such as fine pre - powders , low sintering temperature , reduced or eliminated impurity phases and high conductivity etc . so , the apm is ideal method to synthesize lsgm 采用改进的柠檬酸法(以柠檬酸和edta乙二氨四乙酸为复合络和剂,柠檬酸为燃料)和固相法分别制备了具有钙钛矿结构的中温固体氧化物燃料电池的电解质材料lsgm ( la _ ( 0 . 9 ) sr _ ( 0 . 1 ) ga _ ( 0 . 8 ) mg _ ( 0 . 2 ) o _ ( 3 - ) ) ,用差热?热重分析( dta / tg ) 、 x光衍射分析( xrd ) 、交流阻抗谱技术( ac - impedancespectra ) 、比表面积分析( bet )和烧结收缩率曲线等手段对产物的热分解过程、物相转变和内部结构等进行了表征,并对由这些粉体烧结而成的固体氧化物燃料电池的电解质材料的电导率进行了检测。
