scholarly journals Determination of Six Metals in Galician Red Wines (in Northwestern Spain) by Capillary Electrophoresis

2000 ◽  
Vol 83 (1) ◽  
pp. 183-188 ◽  
Author(s):  
Mar Núñez ◽  
Rosa M Peña ◽  
Carlos Herrero ◽  
Sagrario García
Keyword(s):  
Fused Silica ◽  
Red Wines ◽  
Indirect Uv Detection ◽  
Sodium Potassium ◽  
Fused Silica Capillary ◽  
Order Of Magnitude ◽  
Northwestern Spain ◽  
Capillary Electrophoretic ◽  
Silica Capillary Column

Abstract A simple technique is described for the routine simultaneous capillary electrophoretic determination of 6 cations in wine. Separation was achieved on a fused silica capillary column with a UV-Cat-1, α-hydroxysobutyric acid and 18-crown-6-ether buffer at pH 4.5 and indirect UV detection at 214 nm. The content of magnesium, sodium, potassium, calcium, manganese, and lithium was determined. The method is quantitative, with recoveries in the 92–102% range, and linear over more than one order of magnitude. The precision is better than 2.5–3.4%. The method is sensible, with detection limits between 0.01 and 0.06 mg/L. Twenty-five red wines with a Certified Brand of Origin from Galicia (northwestern Spain) were analyzed by the proposed method. Various wines showed very similar electrophoretic profiles, but significant quantitative differences were observed.

Determination of Ferulic Acid in “AI-FU-NUAN-GONG” Pills by High Performance Capillary Electrophoresis

2013 ◽  
Vol 850-851 ◽  
pp. 57-61
Author(s):  
Hai Xing Liu ◽  
Qing Liu ◽  
Xia Chen ◽  
Yan Fu Huan ◽  
Lin Tong Wang ◽  
...  
Keyword(s):  
Ferulic Acid ◽  
High Performance ◽  
Fused Silica ◽  
Borax Solution ◽  
Fused Silica Capillary ◽  
Capillary Zone ◽  
Good Repeatability ◽  
High Performance Capillary Electrophoresis ◽  
Silica Capillary Column

High performance capillary zone electrophoresis (HPCE) was used in this text to determine the content of ferulic acid in a ready-made Chinese herbal medicine called AI-FUNUAN-GONG (in pills). Electrophoretic separation conditions: Uncoated fused silica capillary column (75um×49/58cm), injection height 7.5cm, 30mmolL-1 borax solution, separation voltage 20kV, injection time 10s, detection wavelength 315 nm, experimental temperature 20°C.Linearity was kept in the concentration ranging from 1~62.5 mg·L-1 of ferulic acid with correlation coefficient of 0.970. The average recovery was 97.541% and RSD value was 6.57%. Sample content of ferulic acid was 0.0715mg/g. This method has the advantages of strong specificity, simpleness, speediness, accurate results and good repeatability in separation and it is useful for determination of ferulic Acid in AI-FU-NUAN-GONG Pills.

Separation and Determination of Diesel Contaminants in Various Fish Products by Capillary Gas Chromatography

1991 ◽  
Vol 74 (6) ◽  
pp. 986-990
Author(s):  
J M Newton ◽  
Barry S Rothman ◽  
F Ann Walker
Keyword(s):  
Diesel Fuel ◽  
Capillary Column ◽  
Fused Silica ◽  
Fish Products ◽  
Seafood Products ◽  
Fused Silica Capillary ◽  
Carry Over ◽  
Gas Chromatographic Method ◽  
Silica Capillary Column

Abstract A semiquantitative capillary column gas chromatographic method Is described for the determination of diesel fuel contamination in various canned seafood products. The diesel contaminants are separated from the fish sample by steam distillation, with little carry-over of interfering intrinsic materials such as fish oils. The diesel fuel is extracted from the condensate with n-hexane, and the extract is analyzed on an SPB-1 fused silica capillary column. The efficiency of recovery of diesel fuel added to canned seafood at levels of 40-400 ppt ranged from 72 to 102%. With the additional step of concentrating the hexane extract, the sensitivity of this procedure may be increased at least 10-fold. This procedure can detect the differences among diesel fuel grades No. 1,2, and 5, and variations within diesel grade No. 2, and thus may be useful in determining the type of petroleum contaminants present in various canned fish products.

scholarly journals Simultaneous Determination of Some Active Ingredients in Cough and Cold Preparations by Gas Chromatography, and Method Validation

2005 ◽  
Vol 88 (4) ◽  
pp. 1093-1098 ◽  
Author(s):  
Thresiana Harsono ◽  
Mochammad Yuwono ◽  
Gunawan Indrayanto
Keyword(s):  
Simultaneous Determination ◽  
Fused Silica ◽  
Chlorpheniramine Maleate ◽  
Column Temperature ◽  
Flame Ionization ◽  
Phenylpropanolamine Hydrochloride ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Dextromethorphan Hydrobromide

Abstract A simple and rapid gas chromatographic (GC) method has been developed for the simultaneous determination of combinations of acetaminophen, phenylpropanolamine hydrochloride, guaifenesin, pseudoephedrine hydrochloride, caffeine, chlorpheniramine maleate, and dextromethorphan hydrobromide in cough and cold tablets and syrups. After extraction of the analyte with alkaline ethyl acetate, 2 μL extract was injected (splitting ratio of 50:1) into a gas chromatograph equipped with a CBP1-M25-025 fused silica capillary column (25 m × 0.22 mm; film thickness, 0.25 μm). The column temperature was held at 150°C for 5 min, increased to 175°C at 3°C/min, and increased to 270°C at 10°C/min. The temperatures of the flame ionization detector and injector were maintained at 300°C. The GC method is inexpensive, rapid, accurate, and precise, and thus it can be used for routine analysis of tablet and syrup preparations in quality control laboratories of pharmaceutical companies.

Bonded Fused Silica Capillary Column GLC Determination of BHA and BHT in Chewing Gums

1984 ◽  
Vol 49 (6) ◽  
pp. 1622-1623 ◽  
Author(s):  
MICHAEL J. GREENBERG ◽  
JOSEPH HOHOLICK ◽  
RICHARD ROBINSON ◽  
KATHRYN KUBIS ◽  
JAMES GRACE ◽  
...  
Keyword(s):  
Capillary Column ◽  
Fused Silica ◽  
Chewing Gums ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Silica Capillary

Gas Chromatographic Determination of Formaldehyde in Coffee Via Thiazolidine Derivative

1986 ◽  
Vol 69 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Tateki Hayashi ◽  
Clayton A Reece ◽  
Takayuki Shibamoto
Keyword(s):  
Capillary Column ◽  
Chromatographic Determination ◽  
Fused Silica ◽  
Gas Chromatograph ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Nitrogen Phosphorus ◽  
Specific Detector ◽  
Silica Capillary

Abstract Thiazolidine formed from trace quantities of formaldehyde in an aqueous solution containing cysteamine at pH 8 was extracted with chloroform and subsequently analyzed by a gas chromatograph equipped with a fused silica capillary column and a thermionic nitrogen-phosphorus specific detector. Recoveries of formaldehyde from the aqueous solutions at levels lower than 1 ppm were slightly over 100%. Quantitative analysis of formaldehyde in commercial brewed and instant coffees showed 3.4-4.5 ppm in the brewed and 10-16.3 ppm in the instant coffee.

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