FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W822080257> ?p ?o ?g. }

• W822080257 abstract "Biodiesel is a renewable, biodegradable alternative to diesel consisting of a mixture of methyl and/or ethyl esters of fatty acids. It is usually produced from the transesterification reaction of triacylglycerols, and a by-product of this reaction is glycerol, the main contaminant of biodiesel. The presence of glycerol in biodiesel is inconvenient for a number of reasons: it may be responsible for the low performance of engines and deterioration of fuel tanks. Therefore, biodiesel quality control is of utmost importance for the commercialization of this fuel and its mixtures with diesel. In this sense, the present work describes the design of a fast, sensitive, inexpensive electroanalytical method for determination of free glycerol in biodiesel samples of the B100 type. Parameters such as acidity, scan rate, and number of successive voltammetric cycles were optimized, conferring large precision and stability to the designed electroanalytical method. A fast extraction method was also developed, in which 2 to 4 g of biodiesel (with a precision of 0.1 mg) is weighed in test tubes, with further addition of 6 mL of water, followed by stirring steps, aqueous phase separation, purification in cartridges of the C18 type, and rotaevaporation. The eletroanalytical conditions employed in the analysis were: perchloric acid analytical concentration of 100 mmol L, scan rate equal to 100 mV s, and the performance of 20 successive voltammetric cycles between -140 and 1300 mV versus Ag/AgCl(sat). The designed eletroanalytical method proved to be a promising analytical tool, with an estimated detection limit of 2.3 mg L (2.5 × 10 mmol L) for glycerol. An excellent linearity was obtained between 15 and 150 mg L (0.16 and 1.6 mmol L) in aqueous medium, which corresponds to a work range from 56 to 560 mg kg (glycerol:biodiesel) when a mass of biodiesel of 2 g is employed in the extraction stage. This consists in a wide work range, which falls well below and above the concentrations established by the regulatory agencies (200 mg kg). Under optimized conditions, the developed electroanalytical method allows glycerol determination in a large number of samples with no need for recalibration. Not taking the time necessary for platinum electrode cleansing and activation as well as analytical curve construction (ca. 75 min) into account, which are carried out in parallel with the extraction, sample handling and electrochemical determination procedures, the whole designed method takes, in triplicate, approximately 80 min." @default.
• W822080257 created "2016-06-24" @default.
• W822080257 creator A5044706771 @default.
• W822080257 date "2009-07-15" @default.
• W822080257 modified "2023-09-23" @default.
• W822080257 title "Desenvolvimento de método de determinação de glicerol livre em biodiesel utilizando a técnica de varredura sucessiva de potencial" @default.
• W822080257 cites W1500684378 @default.
• W822080257 cites W1558755334 @default.
• W822080257 cites W1966584709 @default.
• W822080257 cites W1966740873 @default.
• W822080257 cites W1967924489 @default.
• W822080257 cites W1968496011 @default.
• W822080257 cites W1969580030 @default.
• W822080257 cites W1969910616 @default.
• W822080257 cites W1971059137 @default.
• W822080257 cites W1971326205 @default.
• W822080257 cites W1971890263 @default.
• W822080257 cites W1972826321 @default.
• W822080257 cites W1972999153 @default.
• W822080257 cites W1973586908 @default.
• W822080257 cites W1973677992 @default.
• W822080257 cites W1976451539 @default.
• W822080257 cites W1979414616 @default.
• W822080257 cites W1980353524 @default.
• W822080257 cites W1981391085 @default.
• W822080257 cites W1982096947 @default.
• W822080257 cites W1984141473 @default.
• W822080257 cites W1984587238 @default.
• W822080257 cites W1984890934 @default.
• W822080257 cites W1986630091 @default.
• W822080257 cites W1986708917 @default.
• W822080257 cites W1987216261 @default.
• W822080257 cites W1991265472 @default.
• W822080257 cites W1992321277 @default.
• W822080257 cites W1993803136 @default.
• W822080257 cites W1995603265 @default.
• W822080257 cites W1997996816 @default.
• W822080257 cites W1999219545 @default.
• W822080257 cites W2000101697 @default.
• W822080257 cites W2000816064 @default.
• W822080257 cites W2003637113 @default.
• W822080257 cites W2005126486 @default.
• W822080257 cites W2006523772 @default.
• W822080257 cites W2006898358 @default.
• W822080257 cites W2012450372 @default.
• W822080257 cites W2012851276 @default.
• W822080257 cites W2012964970 @default.
• W822080257 cites W2014048484 @default.
• W822080257 cites W2014430946 @default.
• W822080257 cites W2014708814 @default.
• W822080257 cites W2015958776 @default.
• W822080257 cites W2016608467 @default.
• W822080257 cites W2017658150 @default.
• W822080257 cites W2018341779 @default.
• W822080257 cites W2020826354 @default.
• W822080257 cites W2022127045 @default.
• W822080257 cites W2022695223 @default.
• W822080257 cites W2024770549 @default.
• W822080257 cites W2033983860 @default.
• W822080257 cites W2034121967 @default.
• W822080257 cites W2034392160 @default.
• W822080257 cites W2035854666 @default.
• W822080257 cites W2040654145 @default.
• W822080257 cites W2040841965 @default.
• W822080257 cites W2042632793 @default.
• W822080257 cites W2044530255 @default.
• W822080257 cites W2048682278 @default.
• W822080257 cites W2054277059 @default.
• W822080257 cites W2056565732 @default.
• W822080257 cites W2062183716 @default.
• W822080257 cites W2063919214 @default.
• W822080257 cites W2064700388 @default.
• W822080257 cites W2067627172 @default.
• W822080257 cites W2071681399 @default.
• W822080257 cites W2071808592 @default.
• W822080257 cites W2072311019 @default.
• W822080257 cites W2077133240 @default.
• W822080257 cites W2082189884 @default.
• W822080257 cites W2082277606 @default.
• W822080257 cites W2082853925 @default.
• W822080257 cites W2083428849 @default.
• W822080257 cites W2086999568 @default.
• W822080257 cites W2087853949 @default.
• W822080257 cites W2089162017 @default.
• W822080257 cites W2092465094 @default.
• W822080257 cites W2094212771 @default.
• W822080257 cites W2094581262 @default.
• W822080257 cites W2094902234 @default.
• W822080257 cites W2096530864 @default.
• W822080257 cites W2110790658 @default.
• W822080257 cites W2114056682 @default.
• W822080257 cites W2115142808 @default.
• W822080257 cites W2119688004 @default.
• W822080257 cites W2135881999 @default.
• W822080257 cites W2146086675 @default.
• W822080257 cites W2158219014 @default.
• W822080257 cites W2165285648 @default.
• W822080257 cites W2188637082 @default.
• W822080257 cites W2367255527 @default.
• W822080257 cites W2396824513 @default.

• next