Monitoring the pH and conductivity of dielectric pulps using the ISO and IEC standard guidelines.Application: This study will help in comparing pulp qualities measured by different standards. Regression lines Noun 1. regression line - a smooth curve fitted to the set of paired data in regression analysis; for linear regression the curve is a straight line regression curve indicated good correlations with confidence limits at 95% when comparing the currently used standard guidelines to evaluate the pH (ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. 6588 and IEC (International Electrotechnical Commission, Geneva, Switzerland, www.iec.ch) An organization that sets international electrical and electronics standards founded in 1906. It is made up of national committees from over 60 countries. IEC - International Electrotechnical Commission 60641-2) and conductivity (ISO 6587 and IEC 60641-2) of kraft pulps. For pH measurements, these standard guidelines resulted in rather similar results, whereas, due to the different sample amounts used in the standards, the correspondingly different values of conductivity were obtained. The proper conversion of conductivity values is of great importance, for example, in case of dielectric dielectric (dī'ĭlĕk`trĭk), material that does not conduct electricity readily, i.e., an insulator (see insulation). A good dielectric should also have other properties: It must resist breakdown under high voltages; it should not pulps (6<p11<8; conductivity <3.5mS/m) for research and commercial purposes. Nogueira is assistant professor and Freitas is a PhD student at Chemistry and Biochemistry Department of University of Lisbon The University of Lisbon (Universidade de Lisboa, pron. IPA: [univɨɾsi'dad(ɨ) dɨ liʒ'boɐ]; latin Universitas Olisiponensis) is a public university in Lisbon, Portugal. , Campo Grands Ed. C8, 1749-016 Lisbon, Portugal; Goncalves is the manager of the Process Study and Control Department of Portucel Tejo SA, Centro Fabril de Rodao, 6030-223 Vila Velha de Rodao, Portugal. Email Nogueira at nogueira@fc.ul.pt |
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