摘要：【中文】本发明是一种钛磁铁矿中铁的化学物相分析测定方法：称取一定质量矿样，磁选后，磁性部分试样采用浸取剂浸取钛磁铁矿，残渣与非磁性部分试样合并。合并后的非磁性部分依次采用浸取剂浸取菱铁矿，采用浸取剂浸取赤（褐）铁矿中铁，采用浸取剂浸取硫化物中铁，采用浸取剂浸取钛铁矿中铁，剩余为硅酸铁。此化学物相分析根据共存矿物的状况选择合理的浸取方式进行不同相态的测定，该化学物相分析流程，解决传统的分离测定中误差较大，串相严重的问题，为钛磁铁矿的综合评价和综合利用提供依据。 【EN】The invention relates to a method for analyzing and measuring the chemical phase of iron in titanomagnetite, which comprises the following steps: weighing a certain mass of ore sample, magnetically separating, leaching titanomagnetite from a magnetic part sample by using a leaching agent, and combining residues with a non-magnetic part sample. The combined non-magnetic part is leached into siderite by leaching agent, the iron in hematite (limonite) is leached by leaching agent, the iron in sulfide is leached by leaching agent, the iron in ilmenite is leached by leaching agent, and the rest is iron silicate. The chemical phase analysis selects a reasonable leaching mode to determine different phase states according to the condition of coexisting minerals, and the chemical phase analysis process solves the problems of larger error and serious phase bunching in the traditional separation determination and provides a basis for comprehensive evaluation and comprehensive utilization of the titanomagnetite.

摘要：【中文】本发明提出一种基于增大络合稳定常数进行粗镉中镉测定的化学分析方法，准确称取1.000~3.0000g粗镉样品于400mL烧杯中，加入1:2的稀硝酸50mL，微热使样品溶解完全，加热煮沸驱尽氮氧化物，定容至100‑250毫升容量瓶，移取10.00mL至400mL的烧杯中，冲水至80‑100毫升，加入0.2g抗坏血酸，10%的氟化钾溶液5mL，5%的硫脲溶液5mL掩蔽杂质离子，加入0.5%的二甲酚橙溶液3滴，用1:1氨水调节溶液的PH至3‑5，加入500g/L的六次甲基四胺溶液25mL，然后使用EDTA标准滴定溶液进行滴定。本发明采用调节溶液的PH至6.4‑6.7，增大Cd²⁺与EDTA的络合稳定常数，加速了络合反应效率，提高了终点反应的敏锐性，使肉眼易于观察终点突越。本发明所采用的分析方法具有操作简单，结果准确可靠、时效性强等优点。 【EN】The invention provides a chemical analysis method for measuring cadmium in crude cadmium based on increasing a complexation stability constant, which comprises the steps of accurately weighing 1.000-3.0000 g of a crude cadmium sample in a 400mL beaker, adding 50mL of 1:2 dilute nitric acid, completely dissolving the sample by slight heating, heating to boil and drive out nitrogen oxides, fixing the volume to a 100-plus 250 mL volumetric flask, transferring the volumetric flask into a 10.00-400 mL beaker, flushing to 80-100 mL, adding 0.2g of ascorbic acid, 5mL of 10% potassium fluoride solution, 5mL of 5% thiourea solution to mask impurity ions, adding 3 drops of 0.5% xylenol orange solution, adjusting the pH of the solution to 3-5 by using 1:1 ammonia water, adding 25mL of 500g/L hexamethylenetetramine solution, and titrating by using an EDTA standard titration solution. The invention adopts the method of adjusting the pH value of the solution to 6.4-6.7 and increasing Cd²⁺The complex stability constant with EDTA accelerates the efficiency of the complex reaction, improves the sensitivity of the end point reaction, and enables the naked eyes to easily observe the sudden crossing of the end point. Adopted by the inventionThe analysis method has the advantages of simple operation, accurate and reliable result, strong timeliness and the like.

摘要：【中文】本发明提出一种利用改变络阴离子进行镍催化剂中镍测定的化学分析方法，采用硝硫混酸对丁二酮肟镍的沉淀和过滤滤纸进行消化处理，硫酸大烟冒尽后，分别用10mL浓盐酸对盐类进行两次络阴离子转化处理；用蒸馏水溶解盐类，氨水调节PH，紫尿酸铵作指示剂，EDTA进行滴定。本发明优点：终点颜色有明显突越，具有操作简单，速度快，准确度高等优点。 【EN】The invention provides a chemical analysis method for determining nickel in a nickel catalyst by changing complex anions, wherein the nickel dimethylglyoxime is precipitated by nitric-sulfuric mixed acid and is digested by filter paper, and after heavy smoke of sulfuric acid is exhausted, salts are subjected to two times of complex anion conversion treatment by using 10mL of concentrated hydrochloric acid; dissolving salt with distilled water, regulating pH with ammonia water, using ammonium uricate as indicator, and using EDTA to make titration. The invention has the advantages that: the color of the end point is obviously protruded, and the method has the advantages of simple operation, high speed, high accuracy and the like.