Complexes [CrO2 (C8H5O4) (H2O) 3] and [CrO2 (C8H5O4) (H2O) 3] .H2O were prepared by reduction of CrO3 at room temperature by ethanol in the presence of phthalic acid (H2pht) yield solution that contains monomeric and dimeric Cr (III) complexes. A solution H2pht/Cr molar ratio of 1:1 and 1:2 is indefinitely stable towards precipitation. Their analysis were done by using elemental (C and H), ICP-...

A series of metallosalen-based metal-organic frameworks (MOFs) have been prepared by the post-synthesis modification of Mn(III)SO-MOF, a Mn(3+)(salen)-based MOF. Treatment of Mn(III)SO-MOF with H(2)O(2) effects the removal of the Mn(3+) ions from the salen struts, which can then be remetalated with a variety of metal precursors to form isostructural MSO-MOF materials. The presence of the new me...

Neste trabalho estão descritos alguns métodos para a digestão de amostras de emulsão aquosa de acetato de polivinila visando à determinação de As, B, Cd, Cr, Cu, Fe, Hg, Ni, Pb e Sb por espectrometria de emissão óptica em plasma com acoplamento indutivo (ICP OES). Foram estudados métodos clássicos como calcinação, digestão ácida (a baixa temperatura e a alta temperatura) em chapa de aquecimento...

Nano-MgO was successfully deposited on titania using deposition-precipitation method. The catalyst produced was characterised using FTIR, XRD, BET and XRF and its activity was tested on the transesterification reaction of soybean oil to biodiesel. The catalyst activity improved when the reaction temperature was increasedfrom 150 and 225 C. It was also observed that increasing the reaction time ...

Critical quality control on the determination of boron using ICP-EOS with gravimetric method is carried out. This study was conducted to examine critical aspects which include linearity, LOD, LOQ, precision, and accuracy. Based results showed that ICP-OES following test results. The linearity calibration curve a concentration range 0 - 10 mg/L has correlation coefficient 0.9998 0.9996. standard...