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DEVELOPMENT OF AUTOMATIC CHARGE ANALYZER FOR COLLOIDAL SUSPENSIONS IN PAPERMAKING PROCESS

造纸胶体悬浮液自动电荷分析仪的研制

基本信息

批准号：
09556039
负责人：
TANAKA Hiroo
金额：
$ 5.76万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The sample room of fluorometer was equipped with flattened small magnetic stirrer and also connected with the tube of automatic titrator. And the conventional solid type streaming potential detector (SPD) or manufactured prove type SPD was attached to the automatic titrator with programming and calculating functions. These automatic titrator could precisely analyze dilute sample like 10ィイD1-5ィエD1 M by the titration with 10ィイD1-4ィエD1 M standard solution. Though the anionic samples were conventionally analyzed by the back-titration using the excess amount of cationic polymer, these apparatuses have enable the direct titration of anionic sample with cationic standard solution. Also it has been elucidated that these methods can be employed for accurate analyses of cationic starch with very low charge densities and flocculants with extremely high molecular weights, which cannot be analyzed so far.But the series errors turn up at higher strength than those corresponding to 2 mM divalent ions or 0.2 mM trivalent ions. The ionic strength of practical papermaking water in mills are beyond these values. The automatic titrators developed in this research are very useful when the ionic strength of samples is low. It was difficult, however, to apply the analyses for the industrial samples from papermaking, sewage, factory waste water and so on.Then, fluorescent, ultraviolet and chromophoric labeled polymers were introduced for the first time to estimate the charge amount of suspension with high ionic strength. Fluorescent labeled polymers were scavenged by the heavy metallic ions. Ultraviolet labeled polymers were influenced by the residual lignin. It has finally been found that a chromophoric labeled polymer is applicable to the samples with high ionic strength and heavy metallic ions. It is desired to automate this method as soon as possible.

荧光仪样品室配有扁平的小型磁力搅拌器，并与自动滴定管相连。将传统的固体型流电位检测仪（SPD）或制造的证明型流电位检测仪（SPD）附加在自动滴定仪上，具有编程和计算功能。该自动滴定仪可以用10 μ l μ l D1-4 μ l D1 M标准溶液滴定，对10 μ l D1-5 μ l D1 M等稀释样品进行精确分析。虽然阴离子样品的传统分析方法是使用过量的阳离子聚合物进行反滴定，但这些仪器使阴离子样品与阳离子标准溶液直接滴定成为可能。同时也说明了这些方法可以精确地分析目前还不能分析的极低电荷密度的阳离子淀粉和极高分子量的絮凝剂。但与2 mM二价离子或0.2 mM三价离子对应的序列误差相比，序列误差出现的强度更高。实际造纸用水的离子强度超出了这些值。本研究开发的自动滴定仪在样品离子强度较低时非常有用。然而，对造纸、污水、工厂废水等工业样品的分析是困难的。然后，首次引入荧光、紫外和显色标记聚合物来估计高离子强度悬浮液的电荷量。荧光标记聚合物被重金属离子清除。残余木质素对紫外光标记聚合物有影响。最后发现一种显色标记聚合物适用于高离子强度和重金属离子的样品。希望能尽快实现这种方法的自动化。