滴定法

The effects of the method repeatability, sample mass, standard titrate solution and enviroment temperature on the uncertainty of PTA acid value determined with titrimetry were assessed and discussed.

摘要对滴定法测定精对苯二甲酸酸值的过程中的方法重复性、样品质量、标准滴定溶液、环境温度等方面对不确定度影响进行了评定讨论。

In the residual titration, excess Reagent is added to the test specimen, sufficient time is allowed for the reaction to reach completion, and the unconsumed Reagent is titrated with a standard solution of water in a solvent such as methanol.

在回滴定法，过量的卡尔试剂加入到待测样品中，给与足够的时间去达到反应完全，未消耗的卡尔试剂用溶于溶剂例如甲醇的标准水溶液去滴定。

New method for determination of alginic sodium diester has been developed based on the experiments.

ASD测定的标准方法为络合滴定法，该法在实际操作中滴定终点不明显，误差较大[2]。

The concentration of alginic sodium diester in the range of 2~8 mg/L obeys Beer′s law and the linear equation is A=-0.0639C_ASD+1.507, r=0.9993. The detection limit is 0.065 mg/L.

张淑敏等[3]报道了以四苯硼钠为滴定剂的示波极谱滴定法间接测定ASD的方法，该法精密度等较好，但操作烦琐。

The content of endogenous hormones, including IAA, ABA, GA3 and ZT, and phenol compounds were measured using HPLC, anti that of total sugar and total nitrogen were analyzed by the methods of hyposulphite titration and nitrogen.

采用高效液相色谱法测定插穗内源激素（IAA、ABA、GA3和ZT）和酚类化合物的含量，硫代硫酸钠滴定法测定总糖和凯式定氮法测定总氮含量。

Objective To establish a method for uncertainty evaluation in nonaqueous titration with perchloric acid.

摘 要 目的通过高氯酸液滴定药物含量不确定度的评价，建立普遍适用于滴定法测定药物含量的不确定度评定方法。

The accurate analysis of the uranium content in the reference materials is based on the potentiometric titration method.

采用以基准物质重铬酸钾为滴定剂的自动电位滴定法对基准物质中的铀含量进行准确定值。

Manna sugar potentiometric method has been used to determine the boron in foliage spray fertilizer which contained the humic acid.

甘露醇电位滴定法测定含腐植酸叶面喷施肥中硼的含量，用酸度计来指示滴定终点，不需对样品进行处理，方法操作简单，精密度、准确度较高，相地标准偏差小于 1%，回收率在 97%以上。

Results The new method is appropriate for the solution with lower concentration of Cl -, compared with the fluorescein and potassium chromate indicator method.

为此 ，我们进行了利用内置浊度传感器检测溶液的浑浊程度来判断滴定终点，测定 Cl-含量的方法研究(以下称散射光度滴定法)。

A new method of oscillographic titration for the determination of nitrogen content in flour is described The sample was digested with H 2SO 4 Na 2SO 4 CuSO 4 Oscillographic titration is conducted on NH + 4 with Na TPB method,then calculate the nitrogen content Compared with standard methods,this method choose innoxious titrant,has a sharp titration endpoint, needs no distillation absorption and indicator It has the advantages of being easy and quick in operation,and the determination re...

研究了面粉中蛋白质含量的示波滴定法。样品用H2 SO4 Na2 SO4 CuSO4 消化处理，N以NH4 +的形式存在于试液中，用过量四苯硼钠沉淀铵，沉淀过滤，过量的四苯硼钠用氯化四乙基铵标准溶液返滴定，以四苯硼钠切口消失为终点，计算出氮含量，再换算为蛋白质含量。与通用的标准分析方法相比较，本方法所用试剂无毒，终点变化敏锐，不需蒸馏吸收，不外加指示剂，具有操作简便、快速，测定结果准确可靠。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了