Liquid Chromatography

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Ion Chromatography Discussions about IC and related topics Topics: 402	402	1507	Last post Re: Setting retention time wi… by Jofichrom Fri Mar 06, 2026 2:33 pm
Capillary Electrophoresis Discussions about CE, MEKC and related topics Topics: 52	52	110	Last post Re: Sudden Unknown Peak Durin… by Multidimensional Fri Aug 01, 2025 3:47 pm
GPC/GFC/SEC Discussions about gel permeation chromatography / gel filtration chromatography / size exclusion chromatography Topics: 120	120	469	Last post Re: High-temp filtration of c… by DR Tue Jan 06, 2026 5:42 pm

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11916 topics

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Welcome! by tom jupille » Thu Mar 11, 2021 6:23 pm	0	83594	Last post by tom jupille Thu Mar 11, 2021 6:23 pm

Topics	Replies	Views	Last post
Maximum volume that can be injected for semi-prep by zvi » Wed Dec 09, 2009 6:32 pm	6	2725	Last post by tom jupille Thu Dec 10, 2009 6:40 pm
Weird baseline dips from gradient - Acquity TUV: anyone else by Rob Burgess » Tue Mar 17, 2009 4:54 pm	4	2388	Last post by Rob Burgess Thu Dec 10, 2009 12:22 pm
USP Plate Count by Jay Naidoo » Wed Dec 09, 2009 8:46 am	1	6020	Last post by tom jupille Wed Dec 09, 2009 6:44 pm
no MS trace signal on LC/MS (waters ZQ) by moonchips » Wed Dec 09, 2009 2:25 pm	3	2441	Last post by moonchips Thu Dec 10, 2009 9:05 pm
analysis of organic acids by offroad » Sun Dec 06, 2009 12:17 am	5	2232	Last post by offroad Wed Dec 09, 2009 11:20 am
Waters 717 autosampler by chromeleon » Mon Dec 07, 2009 1:37 pm	5	2740	Last post by juddc Tue Dec 08, 2009 5:39 pm
Frequency of pump priming? by ChromatographyDude » Tue Dec 08, 2009 5:12 am	1	1774	Last post by Consumer Products Guy Tue Dec 08, 2009 1:44 pm
Pressure issuee in Agilent HPLC 1100 series by neo_009 » Mon Dec 07, 2009 1:40 pm	3	2586	Last post by neo_009 Mon Dec 07, 2009 11:30 pm
Ultra Filtration Membrane by John R. Carver » Mon Dec 07, 2009 6:19 pm	1	1727	Last post by JGK Mon Dec 07, 2009 7:03 pm
IP-RP-HPLC by Eric Moore » Wed Oct 28, 2009 7:41 pm	38	8157	Last post by aldehyde Mon Dec 07, 2009 4:18 pm
Zero Intercept and residual plots by mijnadarian » Mon Nov 30, 2009 10:37 pm	11	3356	Last post by HW Mueller Mon Dec 07, 2009 4:05 pm
Heptafluorobutyric acid (HFBA) and RP-stationary phase inter by rick1112 » Sat Dec 05, 2009 6:26 am	4	2593	Last post by HW Mueller Mon Dec 07, 2009 9:27 am
TFA related retention time variation by Sahil » Sat Dec 05, 2009 8:27 pm	2	1904	Last post by Sahil Sun Dec 06, 2009 4:36 pm
Calculating RRFs with polynomial regression???? by mas23 » Sat Dec 05, 2009 5:03 pm	3	2755	Last post by tom jupille Sat Dec 05, 2009 10:01 pm
Pse HCl USP method chemistry help please by cjwitt » Thu Dec 03, 2009 5:54 pm	9	2589	Last post by mbicking Sat Dec 05, 2009 9:08 pm
Curve fit - r versus r-squared by bisnettrj2 » Tue Dec 01, 2009 2:53 am	9	3785	Last post by mbicking Sat Dec 05, 2009 7:31 pm
Agilent 1100 autosampler by Consumer Products Guy » Thu Dec 03, 2009 8:06 pm	4	2663	Last post by mbicking Sat Dec 05, 2009 6:24 pm
toluene diisocianate separation problem by jarod » Thu Dec 03, 2009 6:53 pm	4	1928	Last post by XL Sat Dec 05, 2009 9:38 am
Help on mobile phase replacement for ELSD by Tristan » Wed Oct 29, 2008 11:44 pm	10	4725	Last post by XL Sat Dec 05, 2009 7:26 am
Flow rate problem in low pressure system by ScottHorn » Sat Oct 24, 2009 11:07 pm	3	2038	Last post by JGK Thu Dec 03, 2009 7:01 pm
Jones Chromatography Electronic Valve Actuator by hakang » Thu Dec 03, 2009 5:44 pm	0	1690	Last post by hakang Thu Dec 03, 2009 5:44 pm
Problems with HPLC software by JCAMPOSN » Thu Dec 03, 2009 5:39 pm	2	3161	Last post by Garlarg Mon Dec 07, 2009 2:29 pm
Connecting Manual Injector to Agilent 1100 with Autosampler by mayankthakur » Tue Dec 01, 2009 1:49 pm	5	2367	Last post by Consumer Products Guy Wed Dec 02, 2009 2:03 pm
Amine column degradation by ria.reyes » Mon Nov 16, 2009 7:52 am	5	3891	Last post by Bryan Evans Mon Nov 30, 2009 9:56 pm
Alpha-tocopherol problem by Garlarg » Wed Nov 25, 2009 12:11 pm	11	2989	Last post by aceto_81 Mon Nov 30, 2009 10:00 am
Higher temp = improved recovery of peptide/protein in RP? by DJ » Sun Nov 29, 2009 9:22 am	2	1723	Last post by Bryan Evans Sun Nov 29, 2009 10:50 pm
Analysis of bio-oil by offroad » Wed Nov 25, 2009 4:52 pm	3	1902	Last post by HW Mueller Sat Nov 28, 2009 10:19 am
what are accecptable symmetryfactor limits for HPLC? by seamoro » Thu Nov 26, 2009 2:41 pm	1	1710	Last post by tom jupille Thu Nov 26, 2009 8:40 pm
HPLC calculation..is it correct?!? by seamoro » Thu Nov 26, 2009 1:30 pm	0	2423	Last post by seamoro Thu Nov 26, 2009 1:30 pm
accuracy of drug substance-validation by scio2 » Wed Nov 18, 2009 10:12 pm	27	6415	Last post by HW Mueller Thu Nov 26, 2009 10:34 am
Injector for Agilent 1100 not functioning by mayankthakur » Mon Nov 23, 2009 3:09 pm	8	3419	Last post by MHD Wed Nov 25, 2009 2:09 pm
fat soluble vitamin by lobak » Sun Aug 09, 2009 6:42 am	10	4278	Last post by saioa Wed Nov 25, 2009 9:19 am
baseline drop periodically by Austin » Tue Nov 24, 2009 8:46 am	5	4279	Last post by bisnettrj2 Wed Nov 25, 2009 7:18 am
Vitamin A Palmitate Powder Form by dude » Wed Nov 18, 2009 7:22 am	9	2963	Last post by dude Wed Nov 25, 2009 4:36 am
Separate enantiomers and disastereomers in single run? by MS_chrom » Tue Nov 24, 2009 11:18 am	5	2146	Last post by shahis77 Tue Nov 24, 2009 10:23 pm
HPLC pump won't work by offroad » Fri Nov 20, 2009 3:11 pm	16	7332	Last post by bisnettrj2 Tue Nov 24, 2009 3:47 pm
TLC FLuorecent indicator by Fabiano » Sun Nov 22, 2009 10:50 pm	2	1857	Last post by Fabiano Mon Nov 23, 2009 12:39 pm
analytical method qualification by alicee! » Fri Nov 20, 2009 7:45 am	5	2247	Last post by alicee! Mon Nov 23, 2009 9:35 am
Internal standard for HMMA by craigmcewan » Sat Nov 21, 2009 6:11 pm	1	1430	Last post by kerri Sun Nov 22, 2009 3:42 am
Columns differences by Melissa » Fri Nov 20, 2009 3:44 pm	10	3006	Last post by danko Sat Nov 21, 2009 9:36 am
Do we need extraction here ? by Newchromatographer » Mon Nov 02, 2009 9:48 am	9	2240	Last post by Jumpshooter Sat Nov 21, 2009 3:55 am
System suitability failures by KarenJ » Wed Nov 18, 2009 6:04 pm	2	2731	Last post by Jumpshooter Sat Nov 21, 2009 2:56 am
How can i Lower my LOQ ?? by Newchromatographer » Mon Nov 09, 2009 2:38 pm	12	2284	Last post by sassman Thu Nov 19, 2009 10:01 pm
Peak shape issues by amyrunner » Tue Nov 10, 2009 9:53 pm	11	2172	Last post by sassman Thu Nov 19, 2009 5:36 pm
impurity separation by mskishore13 » Tue Nov 17, 2009 5:22 pm	7	2302	Last post by Bryan Evans Thu Nov 19, 2009 1:19 am
(IC) does anyone have a wiring diagram for ASM-3 Dionex? by MarkRob » Tue Oct 14, 2008 7:58 pm	1	1815	Last post by waynebritton Thu Nov 19, 2009 12:23 am
Aftermarket HPLC replacement parts by bisnettrj2 » Sat Oct 31, 2009 2:07 pm	5	2948	Last post by mbicking Wed Nov 18, 2009 5:22 pm
Strange method in Pharmacopieal forum... by Mattias » Tue Nov 17, 2009 12:21 pm	4	1853	Last post by mbicking Wed Nov 18, 2009 5:18 pm
unusual behaviour with RP column (YMC ODS-AQ) by benzech » Tue Nov 17, 2009 5:37 pm	5	2063	Last post by HW Mueller Wed Nov 18, 2009 4:24 pm
Waters 2796 Bioseparations HPLC by ChromatographyDude » Tue Nov 17, 2009 7:15 pm	3	2341	Last post by Mattias Wed Nov 18, 2009 8:34 am

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