scholarly journals SULFUR COMPOUNDS IN MIXING DIESEL AND BIODIESEL

2008 ◽  
Vol 05 (10) ◽  
pp. 51-57
Author(s):  
Adriana Palmeiro VASCONCELOS ◽  
Sérgio Machado CORRÊA
Keyword(s):  
Sulfur Compounds ◽  
Catalyst Poisoning ◽  
Ionization Detector ◽  
Toxic Compounds ◽  
Operational Conditions ◽  
Flame Ionization ◽  
Selective Detector ◽  
Chemiluminescence Detector ◽  
Different Sources ◽  
Sulfur Chemiluminescence Detector

The mixing of biodiesel and petroleum diesel is being widely used as an attempt to reduce the emissions of sulfur compounds. These compounds are responsible for pollution, causing several diseases, like some breath problems. Sulfur compounds cause car catalyst poisoning and deactivation of processing, contributing to undesirable emissions of other toxic compounds. The goal of this work was to identify sulfur compounds in diesel and in some biodiesel mixtures of different sources. Gas chromatography system coupled with FID (flame ionization detector) was the methodology initially employed, for adjustment of the operational conditions, since FID is a low selectivity detector capable of identifying sulfur compounds and the majority of hydrocarbons. After that, a selective detector for sulfur compounds was employed (SCD - sulfur chemiluminescence detector). The results showed that sulfur compounds decreased proportionally with the addition of biodiesel.

A Flame Ionization Detector Highly Selective and Sensitive to Phosphorus—A Sodium Thermionic Detector

1964 ◽  
Vol 47 (2) ◽  
pp. 293-300
Author(s):  
Laupa Giuffrida
Keyword(s):  
Gas Chromatography ◽  
Organic Compound ◽  
Sodium Salt ◽  
Pesticide Residues ◽  
Relative Sensitivity ◽  
Organophosphate Pesticide ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Sample Extract ◽  
Selective Detector

Abstract A selective detector for use in a gas chromatography system for the detection of organophosphate pesticide residues in foods has been developed and investigated. The device consists of a conventional detector with a coat of a sodium salt fused onto the electrode. There are two requirements: sodium must be present and it must be heated. This sodium thermionic detector is highly selective in response to phosphorus in an organic compound. Other atoms generate some response also, but the relative sensitivity to phosphorus is so great that the sensitivity of the detector can be adjusted to measure essentially only phosphorus. The detector also responds selectively to halides but to a much lesser degree. The detector can detect and measure both organophosphate and chlorinated pesticide residues in a sample extract.

Organic Nitrogen-Selective Detector Used in GasChromatographic Determination of Some Anticonvulsant and Barbiturate Drugs in Plasma and Tissues

1975 ◽  
Vol 21 (1) ◽  
pp. 98-103 ◽  
Author(s):  
Patrick A Toseland ◽  
Michael Albani ◽  
Franz D Gauchel
Keyword(s):  
Simultaneous Determination ◽  
Diethyl Ether ◽  
Organic Nitrogen ◽  
Ether Extract ◽  
Ionization Detector ◽  
Rapid Estimation ◽  
Flame Ionization ◽  
Diethyl Ether Extract ◽  
Selective Detector

Abstract The specific nitrogen flame-ionization detector was used for the rapid simultaneous determination of eight anticonvulsant drugs and one drug metabolite in plasma and for three of the drugs in tissues. The system of analysis allows the occasional rapid estimation of barbiturate in plasma. No derivative formation is required and the whole range of drugs can be determined in a single diethyl ether extract of plasma in about 20 min.

scholarly journals Identifikasi Pengaruh Proses Perebusan dan Penggorengan Kacang Tolo (Vigna unguiculata L. Walp.) terhadap Komposisi Fitosterol

2020 ◽  
Vol 7 (1) ◽  
pp. 7
Author(s):  
Noor Erma Nasution Sugijanto ◽  
Citra Hayu Adi Makayasa ◽  
Gita Deseria ◽  
Rahmania Alrika Ilma Bridgeta ◽  
Miftakhul Rohmah Putri ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Vigna Unguiculata ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Flame Ionization Detector ◽  
Ionization Detector ◽  
Mass Selective Detector ◽  
Flame Ionization ◽  
Selective Detector ◽  
Gas Flame

Pendahuluan: Kacang tolo (Vigna unguiculata L. Walp.) merupakan polong-polongan multiguna dapat berfungsi sebagai hipokolesterolemik. Kacang tersebut mengandung protein tinggi dan rendah lemak, sebagai bahan makanan dikonsumsi dengan cara direbus maupun digoreng. Tujuan: Penelitian ini bertujuan untuk mengidentifikasi komposisi fitosterol pada kacang tolo yang mentah, direbus, dan digoreng serta mengidentifikasi pengaruh proses perebusan dan penggorengan kacang tolo terhadap komposisi fitosterol. Metode: Seluruh sampel diperoleh dari Pasar X, Y, dan Z, area Jawa Timur. Masing-masing sampel diekstraksi dengan n-heksana, aseton, dan kloroform kemudian dianalisis dengan Kromatografi Lapis Tipis (KLT), Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR), Kromatografi Gas-Flame Ionization Detector (KG-FID), dan Kromatografi Gas-Mass Selective Detector (KG-MSD). Hasil: Analisis KLT dan ATR-FTIR menunjukkan adanya kandungan fitosterol pada kacang tolo. Analisis dengan KG-FID menunjukkan adanya kolesterol, kampesterol, stigmasterol, dan sitosterol pada kacang tolo mentah dan direbus dari Pasar X, Y, dan Z sedangkan kacang tolo yang digoreng dari Pasar X hanya mengandung stigmasterol dan sitosterol. KG-MSD menunjukkan adanya kolesterol, kampesterol, stigmasterol, dan sitosterol pada kacang tolo mentah, direbus, dan digoreng. Kesimpulan: Kacang tolo mentah, direbus, dan digoreng dapat diidentifikasi adanya ke-empat fitosterol, yaitu kolesterol, kampesterol, stigmasterol, dan β-sitosterol. Proses perebusan dan penggorengan kacang tolo berpengaruh terhadap komposisi fitosterol.

Study on Sulfur Compounds in the Gasoline

2013 ◽  
Vol 423-426 ◽  
pp. 2367-2371
Author(s):  
Shu Jun Liu ◽  
Hao Nan Xu ◽  
Kun Feng ◽  
Ying Wang
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Sulfur Compounds ◽  
Organic Sulfur Compounds ◽  
Volatile Organic ◽  
Effects Of Temperature ◽  
Chemiluminescence Detector ◽  
Temperature Time ◽  
Optimum Extraction ◽  
Sulfur Chemiluminescence Detector

A procedure to quantify volatile, organic sulfur compounds in gasoline was developed using solid-phase microextraction to preconcentrate the analyses followed by GC and detection with a sulfur chemiluminescence detector (SCD). The effects of temperature, time and PDMS fibers types on the extraction of gasoline has been investigated. The results show that a range of sulfur compounds were identified in gasoline. 75um PDMS, 30min, and 50°C were the optimum extraction conditions. Using the developed method can be used to identify gasoline residues in the fire.

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