分步沉淀

对电镀污泥的浸出液采用加碱调节pH值的方法来分步沉淀铜和锡。

Copper and Stannum are separated by precipitating under different pH values from the leaching solution .

其发酵产物经离心分离后，上清液用无水乙醇分步沉淀抽提得到葡聚糖样品，然后用气相色谱（GC）、红外光谱（IR）、纸层析和化学方法等对葡聚糖样品进行鉴定。

The dextran sample which was extracted by ethanol precipitation and purified was assayed by gas chromatography ( GC ), infrared atlas , etc.

采用分步沉淀法制备ZrO2（Y2O3）超细陶瓷粉末。

ZrO_2 ( Y_2O_3 ) ultrafine ceramic powders were prepared by step-by-step precipitation and using several surfactants to modify their surface .

国内外湿法冶金中常采用黄钾铁矾法或针铁矿法等方法除铁，硫化沉淀法分步沉淀或较高pH条件下萃取分离镍、钴，不适用于常温、较低pH的生物浸出液。

Iron was precipitated by the formation of jarosite or goethite . And sulfide precipitation or extraction of nickel and cobalt at high pH were used in the hydrometallurgy at home and abroad .

用不同敞度磷钨酸钠&镁溶液，分步沉淀兔血清中脂蛋白，获得高密度脂蛋白（HDL）液。

Lipoproteins in rabbit serum were isolated by increasing concentration of phosphotungstate-magnesium solution and high density lipoprotein ( HDL ) was obtained .

用AB-8大孔吸附树脂分离、乙醚-丙酮分步沉淀得到纯百合皂苷。

Saponin was separated and purified by AB-8 porous resin absorption and step-sedimentation with acetone-ether .

采用分步沉淀法制备铜锰型催化剂，考察了（NH4）2CO3、Na2CO3和NaOH三种沉淀剂对催化剂活性的影响。

Effects of precipitation agents , ( NH_4 ) _2CO_3 , Na_2CO_3 and NaOH , on the catalytic activity of copper manganese oxide catalysts for CO oxidation at room temperature were investigated .

研究了在4MPa压力下，用混沉法、分步沉淀法及共沉淀法制得的CuO－ZnO－ZrO2催化剂对CO／H2合成甲醇的催化活性。

Catalytic activities of CuO ZnO ZrO 2 catalysts , prepared by various precipitating methods such as mixed precipitating , two step precipitating and coprecipitating , for synthesis of methanol from CO and H 2 at 4.0 MPa were studied .

通过pH7.6的磷酸溶液抽提、65℃热变性、硫酸铵分步沉淀得到大豆胰蛋白酶抑制因子的粗提液。

The crude extract of the soybean trypsin inhibitor was obtained by the extraction of phosphoric acid buffer ( pH7.6 ), thermal denaturation ( 65 ℃) and ammonium sulfate precipitation .

分别采用丙酮沉淀、硫酸铵分步沉淀和柱层析技术从链霉菌8539发酵液中分离、纯化出APH（3′）抑制剂8539，并对其部分理化性质进行了测定。

The APH ( 3 ' ) inhibitor 85 & 39 was isolated by precipitation with acetone from the broth filtrate and then extracted with distilled water . The active component was purified by column chromatography on CM-Sephadex C-50 ( NH_4 ~ + form ) .

分步沉淀去铁提高重铀酸铵产品质量

Removing iron to improve the quality of Adu by multistep precipitation

分步沉淀&絮凝法在电镀废水处理中的应用

Treatment of Electroplating Wastewater by Two Step Precipitation-Coagulation Process

利用分步沉淀分级得出了分子量分布。

Progressive precipitation seperation has been used to study the molecular weight distribution .

分步沉淀可使黄藤粗碱含量大大提高，可提高经济效益。

To precipitate step by step can increase crude alkaloid of fibrauretine and improve economic performance .

分步沉淀法制备氧化锌超细粉体的工艺研究

A Technical Study on Preparation of Ultra-fine Zinc Oxide Powder with Step by Step Precipitation Method

分步沉淀法制备YAG：Ce~（3+）荧光粉及其发光性能

Preparation and Photoluminescence Properties of YAG : Ce ~ ( 3 + ) Phosphor by Step Precipitation

在传统沉淀法的基础上，研究了用分步沉淀来处理铬的废渣。

Based on the traditional methods of sedimentation , the authors carry out experiments to treat Chromium Slag by applying the method of several steps of sedimentation .

采用化学分步共沉淀工艺，改善了添加剂在ZnO压敏元件中分布的均一性，从而提高了ZnO压敏电阻器的电性能。

The distribution of additives in the zinc oxide varistors is more homogeneous by the process of chemical coprecipitation , which improves the electrical properties of the zinc oxide varistors .

在分步共沉淀法制备催化剂时，加入柠檬酸或乙二醇燃烧剂，进一步提高了催化剂的活性。

During the preparation of the catalysts by stepwise co-precipitation method , citric acid and ethylene glycol were chosen as combustion agents .

本论文采用分步共沉淀法制备了一系列钼铋系复合金属催化剂，该催化剂合成的丙烯醛选择性高、副产物丙烯酸少，是一种适合生产蛋氨酸的丙烯醛催化剂。

Stepwise co-precipitation method is used to prepare Mo-Bi-based catalysts . The acrolein selectivity measured over the catalysts is higher and the yield of byproduct acrylic acid is lower . So as-produced product , acrolein , can properly used for the synthesis of methionine .

pH值分步配位沉淀反应研究进一步显示干苔多糖与Cu2+的沉淀能力比Al3+好。

The step by step dative precipitate reaction of pH showed that the precipitate ability of the Cu 2 + and polysaccharides was better than Al 3 + .

利用分步中和&沉淀方法去除高浓度镀铬废水中重金属离子杂质。

Using the method of stepwise neutralization precipitation , the impurities of heavy metal ion in chrome plating effluent with high concentration are removed .