burette stand,burette support

Determination of SeO_2 in industrial selenium dioxide by sodium hyposulfite titration;硫代硫酸钠滴定法测定工业二氧化硒中SeO_2baF汉语字典

Determination of Phosphorus in Soil Samples by Oscillopolarographic Titration;示波极谱滴定法测定土壤中的磷baF汉语字典

Rapid titration of manganese dioxide content in pyrolusite;软锰矿中二氧化锰含量的快速滴定baF汉语字典

Conceal disturbing elements like iron,copper,lead with hydrogen fluoride amine-EDTA,add the potassium iodide to separate iodine, and take starch as indicator,titrate with sodium hyposulfite.试样以王水分解、泡塑富集分离金,硫脲解脱,以硝酸-硫酸破坏硫脲,用氟化氢胺-EDTA掩蔽铁、铜、铅等干扰元素,加碘化钾使之析出碘,以淀粉为指示剂,用硫代硫酸钠进行滴定。baF汉语字典

This paper writes adout VB program of alkali titrate weakacid, draws the conclusion of mathe-matical modei of that prcgram, discusses the approaches of the modei and shows the results of applying VB program to practical cases.用Visual BaSic程序设计语言设计编制了模拟强碱滴定弱酸的程序,推导了建立模拟强碱滴定弱酸程序的数学模型,讨论了模拟的处理思路,并给出了程序对实例的处理结果。baF汉语字典

Due to different stability constants between barium chlorophosphonazo Ⅲ and other compound of bariate,sulfate was titrated by barium chloride standard solution using chlorophosphonazo Ⅲ as indicator when pH value was 17.介绍了在洗衣粉中含有三聚磷酸钠、4A沸石、硅酸盐和碳酸盐等无机盐与SO42-共存的情况下,经过特殊化学处理后,基于Ba2+与偶氮氯膦Ⅲ形成络合物的稳定常数和其他钡盐的差异,在pH=1 7,以偶氮氯膦Ⅲ为指示剂,用氯化钡标准溶液直接滴定硫酸根。baF汉语字典

The influences of the electric factors on the accuracy of the constant current coulometrictitration were introduced, such as the output undulation of the constant current source, the uncertainty of the current calibration reference, the external circuit and environmental factors.分析恒电流库仑滴定过程中电气因素的影响 ,包括恒流源输出精度的影响、参考标准不确定度的影响、外部连接线路的影响、实验环境对电路的影响等 ,提出了减小这些影响的办法。