Determination of water hardness through experiments to understand meaning and common methods of hardness; grasp principle and method of determination of hardness of water by EDTA; mastery of eriochrome black-t indicator and application of calcium indicator, and understand the characteristics of metal-...
Conclusion :This method did not generate ammonia , and did notpollute environment, to obtained event was accurate and precision,the method of the EDTA titration detects thecontent of total hardness when to join tartaric acid - sodium carbonate mixture was Medium.Water quality; Total hardness; EDTA...
of the method of total degree of hardness and calcium degree of hardness.Allocation and mark that studied EDTA further settle, acquaint with the operation method of calcium indicator and understand to go together with a principle of titration and go together with the characteristics of a titration...
关键词:总硬度;EDTA滴定法;测定;体会SomeexperienceofdeterminationoftotalhardnessinwaterbyEDTAtitrationChineseabstractEDTAtitrationruleisthatthetotalhardnessofwaterischeapandsimple。Theoperationisconvenient,accurateandreliable,andsoon.Itisusuallyusedinenvironmentalmonitoring.Throughalargenumberofexperiments,thespecific...
The proposed method overcame the deficiencies of the standard method. By measuring the total hardness in surface water, groundwater and standard samples using the standard method and the improved method, the results had no significant differences. Key words: EDTA titration total hardness water buffer...
Key word:Total hardness;EDTATitration method;Determination;Experience 第一章前言 在环境监测分析中,总硬度为常规分析项目。测定地下水和地面水的总硬度,一般常用ED TA 滴定法(GB 7477- 87)。。由于ED TA 是一种.强的络合剂,易受水样中其它物质的干扰,如不注意,会影响.定结果的正确性。为此,我们根据工作实践...
Key word:Total hardness;EDTATitration method;Determination;Experience5 学位类别:学士学位 0第一章 前言 4第二章 测定水中的总硬度 4 4 42. 1 样品测定 42. 2 精密度和准确度检验 4 53. 1 调节PH 值 53. 2 加入铬黑T 指示剂后,应尽快完成滴定 53. 3 滴定过程时应特别注意以下问题 53. 4 ...
B ased on the method and princ iple of uncertainty ev aluation, throug h the ex ample of determination total hardness in water by the ED T A t i~ af i on, the sources of uncertaint y were analyzed and the mathematical model of the unc ertainty w as establi shed . Some factors ...
1 Observation Calculation Hardness as CaCO3=V1x S x 1000mg / L V 3 3 Hardness as CaCO3=1000 V1= ...mg / L V Results
thespecificoperationoftherelevantissuestoexplore,foundthatthereareseveralaspectsoftheexperimentalprocessneedtopayattentionto,andtheaccurateandreliabledatawithacertainguarantee.Keyword:Totalhardness;EDTATitrationmethod;Determination;Experience学位类别:学士学位...0第一章前言...3第二章测定水中的总硬度......