Peak Fraction Purity and Chromatographic Resolution: Gaussian Peaks Revisited

2022 ◽  
Author(s):  
André M. Striegel ◽  
Deborah A. Striegel
Keyword(s):  
Chromatographic Resolution ◽  
Peak Fraction

Improved thin-layer chromatographic determination of phospholipids in gastric aspirate from newborns, for assessment of lung maturity.

1988 ◽  
Vol 34 (4) ◽  
pp. 736-738 ◽  
Author(s):  
D Serrano de la Cruz ◽  
E Santillana ◽  
A Mingo ◽  
G Fuenmayor ◽  
A Pantoja ◽  
...  
Keyword(s):  
Thin Layer ◽  
Fetal Lung ◽  
Chromatographic Determination ◽  
Solvent Mixture ◽  
Gastric Aspirate ◽  
One Dimensional ◽  
Acetic Acid Water ◽  
Chromatographic Resolution ◽  
Lung Maturity

Abstract This one-dimensional thin-layer chromatographic method is used for assay of phospholipids in the gastric aspirate of newborns. The solvent mixture (chloroform/hexane/methanol/glacial acetic acid/water, 12/7/4/3/0.3 by vol) completely resolves lecithin, sphingomyelin, phosphatidylinositol, phosphatidylserine, phosphatidylethanolamine, and phosphatidylglycerol. The method is simple, precise, inexpensive, and rapid (chromatographic development takes less than 25 min) and gives high chromatographic resolution. We used this method to determine the lecithin/sphingomyelin densitometric ratio (L/S ratio) and the phosphatidylglycerol percentage in 200 samples of gastric aspirate and found an L/S ratio of 2.5 to be a satisfactory cutoff value for distinguishing fetal lung maturity and immaturity. We confirmed that the presence of phosphatidylglycerol excluded the possibility of respiratory distress.

scholarly journals Identification of a TBHQ-Interfering Peak in Crude Canola Oil Using AOCS Official Method Ce 6-86 and its Chromatographic Resolution

2017 ◽  
Vol 94 (10) ◽  
pp. 1323-1328
Author(s):  
Michael R. Blumhorst ◽  
Travis Mahan ◽  
Kathryn Stanley ◽  
Aaron Griffith ◽  
Mark W. Collison
Keyword(s):  
Canola Oil ◽  
Official Method ◽  
Aocs Official ◽  
Aocs Official Method ◽  
Chromatographic Resolution

Validated HPTLC Method for the Estimation of Oxetacaine in Pharmaceutical Formulations

2021 ◽  
pp. 5668-5672
Author(s):  
Kavitha J ◽  
Bonda Vismitha ◽  
Kokilambigai KS ◽  
Seetharaman R ◽  
Lakshmi KS
Keyword(s):  
Mobile Phase ◽  
Glacial Acetic Acid ◽  
Current Method ◽  
Cost Effective ◽  
Pharmaceutical Formulations ◽  
Relieve Pain ◽  
Ich Guidelines ◽  
Validation Parameters ◽  
Chromatographic Resolution ◽  
Hptlc Method

Oxetacaine is a potent local anesthetics used to relieve pain associated with peptic ulcer. The current method details about a rapid, accurate and precise HPTLC technique for the assessment of Oxetacaine in Pharmaceutical formulation. Chromatographic resolution was carried out on precoated HPTLC plates (Silica gel 60 F254 on Aluminum plate) employing methanol: water: glacial acetic acid (8: 1.8: 0.2 v/v/v) as mobile phase. Densitometric assessment was carried out at 220nm [Camag TLC Scanner III with winCATs software (version – 1.3.4)]. The drug was identified with a Rf value of 0.61. The reliability of the projected method was ascertained by evaluating various validation parameters as per ICH guidelines. The proposed technique can evaluate ten or more formulation units concurrently in a single run and affords a more rapid and cost-effective QC tool for regular analysis of Oxetacaine in pharmaceutical formulations.

Sign in / Sign up

Export Citation Format

Share Document