ANALYTICAL PROCEDURES FOR DETERMINING METALS IN GASOLINE AFTER PRE-TREATMENT ACID
Journal Title: Periódico Tchê Química - Year 2018, Vol 15, Issue 30
Abstract
The work presents a study through electroanalytical procedures for the determination of metals in gasoline samples. The determination of metals in fuel is an issue of environmental relevance because it believes that these elements can be released into the atmosphere causing damage to the environment and health. Also when present outside the established acceptable limit, the reactivity of these elements may directly imply the quality of the fuels. Thus, the use of low cost and efficient techniques such as electroanalytics are shown as a viable option for this purpose. The access to the metals by voltammetric techniques was only possible after the acid digestion of the samples and two digestion procedures were evaluated (Digestor Block and Microwaves) in different acid purities. The comparison between the two digestion systems (open and closed) using the same experimental conditions showed that the digestion in the closed system presented better results, due to the lower risk of contamination of the sample. The evaluated procedure presented satisfactory results from an analytical and statistical point of view and, therefore, it was considered adequate for the analyzed matrix.
RATIONALE FOR WATER SOIL WASHING TECHNOLOGIES BY GROWTH REGULATION
When irrigation of land in the arid zone, one of the mandatory elements for maintaining the water-salt balance is soil washing. At present, washing standards are calculated and recommended for different soils. However, t...
IMPROVEMENT OF THE TRANSESTERIFICATION PARAMETERS USING OIL BLENDS: CRUDE FISH OIL & FRYING OIL
To improve the parameters of the transesterification process by the basic route for the production of biodiesel, crude fish oil (AP), obtained from the viscera of fish, and residual vegetable oils (AR) blenders were used...
IDEAS OF STUDENTS ON THE ATOMISTIC NATURE OF MATTER
The alternative concepts movement that emerged in the 1970s continues to be highly relevant in the teaching of sciences, particularly chemistry, given that it can be the starting point for teachers to revisit their pedag...
Simulation of the Stress-Strain State for Long-Length Flexible Pipes
An algorithm for calculating the stress-strain state for a system of long-length flexible pipes on a drum is proposed. The material which the pipe is made of operates in the area of plastic deformation due to the relativ...
THE MOST EFFICIENT CORROSION INHIBITORS FOR ALUMINUM ANODE OF ELECTROCHEMICAL CELL USED AS A CONTROLLED HYDROGEN GENERATOR
In this article the authors have presented the results of the research into the development of the most efficient anode-electrolyte combination for a hydronic electrochemical cell fitted with an aluminum anode, designed...