کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10556842 | 968435 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of Ca, K, Mg, Na, sulfate, phosphate, formate, acetate, propionate, and glycerol in biodiesel by capillary electrophoresis with capacitively coupled contactless conductivity detection
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
RSDBGECTABLOQC4dInorganic contaminantEOF2-(N-morpholino)ethanesulfonic acid - 2- (N-مورفولینو) اتان سولفونیک اسیدcetyltrimethylammonium bromide - اتلی تریمتیل آمونیوم برومیدI.S. - است.internal standard - استاندارد داخلیOrganic acid - اسید ارگانیکFormic acid - اسید فرمیکCapillary electrophoresis - الکتروفورزمویرگیbackground electrolyte - الکترولیت پس زمینهrelative standard deviation - انحراف استاندارد نسبیAutoxidation - اکسیداسیونBiodiesel - بیودیزلContactless conductivity detection - تشخیص هدایت الکتریکی بدون تماسCapacitively coupled contactless conductivity detection - تشخیص هدایت الکتریکی بدون تماس capacactivelyElectroosmotic flow - جریان الکترواسموتیکHIS - خودLod - لودlimit of quantification - محدودیت اندازه گیریlimit of detection - محدودیت تشخیصMeS - مس
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Determination of Ca, K, Mg, Na, sulfate, phosphate, formate, acetate, propionate, and glycerol in biodiesel by capillary electrophoresis with capacitively coupled contactless conductivity detection Determination of Ca, K, Mg, Na, sulfate, phosphate, formate, acetate, propionate, and glycerol in biodiesel by capillary electrophoresis with capacitively coupled contactless conductivity detection](/preview/png/10556842.png)
چکیده انگلیسی
In this work, a new method employing capillary electrophoresis (CE) for the determination of several species in biodiesel is introduced. The concentrations of inorganic species (Na+, K+, Ca2+, Mg2+, SO42â, and PO43â) and glycerol are of interest to the regulatory authorities due to their ability to form undesirable compounds in engines. Additionally, other species of low molecular weight (e.g., acetate, formate, and propionate) are of interest because they contribute towards increasing the acidity. These species are formed by the degradation of biodiesel and cause damage to engines and the environment. The cation separation was performed in background electrolyte (BGE) composed of 30 mmol Lâ1 of 2-(n-morpholino)ethanesulfonic acid (MES)/L-histidine (His), pH 6. The separation of anionic species was carried out in similar BGE with 0.2 mmol Lâ1 cetyltrimethylammonium bromide (CTAB) added. For glycerol, a neutral species, its oxidation with periodate was employed. This well-known reaction is specific to polyols and generates iodate. The amount of iodate produced by the reaction was determined by CE. The separation was carried out in approximately 1 min using BGE composed of 30 mmol Lâ1 acetic acid, pH 3. The analytical parameters evaluated were: linearity (r > 0.99), the RSD values for area and migration time were < 3.4% and 0.9%, respectively, and recovery was in the range of 89 to 107%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microchemical Journal - Volume 99, Issue 2, November 2011, Pages 267-272
Journal: Microchemical Journal - Volume 99, Issue 2, November 2011, Pages 267-272
نویسندگان
Thiago Nogueira, Claudimir Lucio do Lago,