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Priority to RO129864ApriorityCriticalpatent/RO98303B1/ro
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Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means
(AREA)
Abstract
Inventia de fata se refera la o metoda de determinare rapida a fierului din hidroxizi si carbonati alcalini, folosind solutia obtinuta la tratarea a 10...50 g proba de anlizat, cu 20...100 cm3 HCl 37% direct pentru determinarea spectrometrica în UV a fierului, la lamda=335, 340, 350 sau 360 nm în solutie apoasa sau solutia apa-dioxan 1.1, utilizând curbe de etalonare trasate în prealabil pe solutii de clorura de sodiu 1,2...5 M si Fe3+ de concentratii 2...24 ppm.
RO129864A1987-09-251987-09-25Metoda de determinare a fierului din hidroxizi si carbonati alcalini
RO98303B1
(ro)
Manufacture of paper using copolymers of 2-acrylamido-2-methylpropane sulfonic acid for increasing rate of dewatering of high mechanical/thermomechanical pulp furnishes