[mslee]

Can liquid chromatography be used to detect low levels of aldehydes (formaldehyde, acetaldehyde, etc) in ethylene glycol? normal LC? ion exchange LC??

[Alpha-Omega]

You can use LC to determine aldehydes. You can use Ion Ecchange for ethylene glycol.

Aldehydes:

http://www1.dionex.com/en-us/acclaim_library/lp28434.html

Acclaim PA: http://www1.dionex.com/en-us/webdocs/4143_Acclaim_PolarAdvantage_V19.pdf

Acclaim 120 c18: http://www1.dionex.com/en-us/webdocs/4139_Acclaim_120_V19.pdf

Acclaim E1 EPA Method 1004: http://www1.dionex.com/en-us/acclaim_library/flash/fullflash25933.html

ICE-AS1-Ethylene Glycol:  http://www1.dionex.com/en-us/webdocs/4276_DS_IonPac_ICE-AS1_02Apr07_LPN0814_03.pdf

Here is a huge hit list for application notes for LC Applications for Aldehydes:

http://search.yahoo.com/search;_ylt=A0geu428mQpIevkA3AFXNyoA?p=LC+Applications+for+aldehydes&y=Search&fr=yfp-t-501&ei=UTF-8

Additionally, if you go to www.epa.gov and type aldehydes in the search fiel you will get alot of information.

Separationsnow.com has huge vault of inforamtion regarding chromatography separations: 

http://www.separationsnow.com/coi/cda/home.cda?chId=0