CHEM3001_PP1.2010 - α Z-Bisabolene 1655 2-Hexyl...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
THE UNIVERSITY OF THE WEST INDIES MONA DEPARTMENT OF CHEMISTRY CHEMICAL ANALYSIS II - CHEM3001 TUTORIAL Paper 1 1. Outline the Kovats method for specifying the relative retention of solutes in gas chromatography. Briefly discuss the merits of this system. 2. Dodecane, eugenol and tetradecane eluted from a DB-5 gas chromatographic column with retention times of 14.7, 21.3 and 23.3 minutes respectively. If the dead time, t M , on the column is 1.6 minutes what is the Kovats Retention Index for eugenol. 3. Graphically determine the Kovats Index for the following analytes: Analyte t R (seconds)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: α-( Z )-Bisabolene 1655 2-Hexyl-( Z )-cinnamaldehyde 2261 4-Methoxystilbene 2720 on a PolyDiMethylSiloxane stationary phase given the data below. n-Alkane t R (seconds) Air 57 Pentadecane 1646 Hexadecane 1885 Heptadecane 2113 Octadecane 2331 Nonadecane 2539 4. Given the data below: SOLUTE t R '/min SOLUTE t R '/min Toluene 0.287 Decane 1.273 Nonane 0.636 1-Octanol 1.864 1-Heptanol 0.934 Undecane 2.620 4-Octanol 1.047 Dodecane 5.024 (i) calculate the Kovats retention index for each compound; (ii) predict the retention times for 1-nonanol and 4-nonanol. DMK20100305...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online