Sample Prep - Chromatography Forum

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Welcome! by tom jupille » Sat Nov 13, 2010 9:02 pm	0	8747	Last post by tom jupille Sat Nov 13, 2010 9:02 pm

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Please Read This! by tom jupille » Sat Nov 13, 2010 11:54 pm	0	9343	Last post by tom jupille Sat Nov 13, 2010 11:54 pm
How to embed chromatograms and reports by tom jupille » Sat Nov 13, 2010 11:53 pm	0	9134	Last post by tom jupille Sat Nov 13, 2010 11:53 pm
Where to look first. by tom jupille » Sat Nov 13, 2010 11:52 pm	0	9224	Last post by tom jupille Sat Nov 13, 2010 11:52 pm
sodium sulfate cleaning by MichaelVW » Wed Jul 01, 2020 5:33 pm	4	614	Last post by DR Fri Jul 31, 2020 1:11 pm
Carbamate degradation in water samples by ifqal » Mon Jul 06, 2020 5:52 pm	1	701	Last post by James_Ball Tue Jul 07, 2020 6:29 pm
Stability of Benzo(a)pyrene-D12 by James_Ball » Mon Jul 06, 2020 2:32 pm	0	356	Last post by James_Ball Mon Jul 06, 2020 2:32 pm
Derivatization with MSTFA, NH4I and Ethanethiol by chem0211 » Tue Oct 15, 2019 7:54 am	3	2722	Last post by Don_Hilton Sun Jun 07, 2020 12:12 am
Alternative SPE solvent? by Cantacoxinha » Thu Jul 25, 2019 2:08 pm	3	3178	Last post by Don_Hilton Sun Jun 07, 2020 12:00 am
Enzyme activity by direct monitoring of transamination rxn by JLeeHads » Thu Aug 29, 2019 2:57 pm	1	2600	Last post by Don_Hilton Sat Jun 06, 2020 11:52 pm
Does lactose monohydrate convert to lactose after drying? by chemist23 » Thu Sep 19, 2019 1:15 pm	2	2379	Last post by Don_Hilton Sat Jun 06, 2020 11:24 pm
SPE cartridge decomposition? by KathyPolo » Fri Jun 05, 2020 12:41 am	0	734	Last post by KathyPolo Fri Jun 05, 2020 12:41 am
Sample prep with MSA by CFire0515 » Thu May 21, 2020 12:54 pm	0	1034	Last post by CFire0515 Thu May 21, 2020 12:54 pm
sodium tetraethyl borate by Sassolini » Tue Apr 07, 2020 3:37 pm	2	1142	Last post by jerole Wed May 20, 2020 10:22 am
How to extract Ethanol from gel Hand sanitizers by chemist23 » Tue May 12, 2020 7:53 pm	1	882	Last post by Consumer Products Guy Wed May 13, 2020 2:05 pm
Sodiumazide in alkaline hydrolysis by Förbrylium » Tue Nov 12, 2019 9:21 am	3	2132	Last post by trozen Sun May 03, 2020 5:34 am
How do I know how much I should dilute my sample in HPLC by hibu » Sat Apr 25, 2020 8:58 am	2	819	Last post by hibu Sat Apr 25, 2020 11:03 am
Oxidation using Oasis WCX cartridges by Mattias » Fri Jan 24, 2020 1:06 pm	1	1696	Last post by Wil1liams Thu Apr 23, 2020 9:00 pm
derivatisation with sodium tetraethyl borate by emsman » Mon Mar 25, 2013 1:37 pm	5	4427	Last post by Sassolini Tue Apr 07, 2020 3:01 pm
SPE Class A requirement? Graduated conical centrifuge tubes by LALman » Tue Mar 31, 2020 9:22 pm	1	996	Last post by James_Ball Tue Mar 31, 2020 9:49 pm
PAH / DRO by hexane/acetone microwave/ultrasonic extraction by LALman » Wed Sep 05, 2018 8:41 pm	9	4720	Last post by LALman Wed Mar 11, 2020 5:55 pm
525.2 Extraction Guidance by ScientiaPotentiaEst » Fri Feb 21, 2020 2:46 pm	4	1448	Last post by James_Ball Mon Mar 02, 2020 10:45 pm
Matrix-matched calibration question by thohry » Thu Feb 20, 2020 1:32 pm	1	1234	Last post by Steve Reimer Thu Feb 20, 2020 5:00 pm
Auto pipette availability by Bigbear » Wed Feb 19, 2020 3:10 pm	0	1414	Last post by Bigbear Wed Feb 19, 2020 3:10 pm
Pesticides analysis by johnmario » Sat Feb 08, 2020 2:00 pm	1	1419	Last post by rb6banjo Tue Feb 11, 2020 5:16 pm
EPA 549.2 Conditioning Solution A by MadAsAHatter » Tue Feb 04, 2020 5:33 pm	2	1318	Last post by Mritari Thu Feb 06, 2020 8:16 pm
Diazald availibility by Bigbear » Thu Jan 09, 2020 12:59 pm	4	1622	Last post by James_Ball Thu Jan 09, 2020 10:54 pm
about weighing out material by agao123 » Tue Dec 17, 2019 4:43 am	4	1802	Last post by rb6banjo Fri Jan 03, 2020 2:05 pm
Explanation of derivitization sequence by john@sombra » Fri Dec 20, 2019 9:44 pm	0	1777	Last post by john@sombra Fri Dec 20, 2019 9:44 pm
Preparation of octenyl succinate by mkarkov » Fri Dec 20, 2019 12:34 pm	0	1637	Last post by mkarkov Fri Dec 20, 2019 12:34 pm
Purge and trap - loss of methylene chloride by Mathieu_CZRI » Mon Aug 28, 2017 6:01 pm	18	6205	Last post by Bigbear Wed Dec 18, 2019 1:34 pm
sample in pH=7.4 buffer with salts by agao123 » Mon Sep 16, 2019 3:43 pm	2	2570	Last post by agao123 Wed Nov 27, 2019 5:00 pm
peroxide transfer from textiles to water by ucanmoruk » Wed Nov 13, 2019 11:45 am	1	1761	Last post by Steve Reimer Mon Nov 18, 2019 9:37 pm
Automatic timer 40 amps for hot plates by bdhedhy19 » Mon Oct 21, 2019 3:04 am	3	2326	Last post by bdhedhy19 Tue Nov 05, 2019 3:37 am
Poor Recoverability From SPE by handlovic » Thu Oct 10, 2019 1:48 am	2	2426	Last post by Steve Reimer Mon Oct 28, 2019 5:00 pm
Povidone Nitrogen Content - Kjeldhal method by Geof235 » Fri Oct 18, 2019 4:45 pm	3	2128	Last post by DR Wed Oct 23, 2019 1:57 pm
Derivitization Reaction for sample analysis by Geof235 » Fri Oct 18, 2019 8:49 pm	0	2338	Last post by Geof235 Fri Oct 18, 2019 8:49 pm
SPME procedure modification by Pynball » Mon Sep 30, 2019 10:41 am	5	2312	Last post by Dorlis03 Tue Oct 08, 2019 5:54 am
Background peaks and trash in extraction by ScientiaPotentiaEst » Wed Sep 25, 2019 6:25 pm	3	2254	Last post by ScientiaPotentiaEst Thu Sep 26, 2019 12:29 pm
SPE stationary phase by Pynball » Thu Sep 12, 2019 9:42 am	1	2311	Last post by tom jupille Fri Sep 13, 2019 11:48 pm
SIDA issue by Krusvar » Mon Sep 02, 2019 12:50 pm	6	2694	Last post by James_Ball Wed Sep 11, 2019 4:54 pm
Calibration of balances, weights, and required check range by LALman » Fri May 04, 2018 8:11 pm	8	6431	Last post by LALman Mon Aug 19, 2019 12:22 am
Dilution Factor For Method 9056 by adamwmcanally » Thu Aug 08, 2019 3:10 pm	1	2350	Last post by James_Ball Thu Aug 08, 2019 6:36 pm
How to determine 5ppm impurity in 1 gram API? by Simyo » Tue Aug 06, 2019 7:55 am	4	2485	Last post by Simyo Wed Aug 07, 2019 7:35 am
Dilution from stock solution - wrong results by Ma Yik Ken » Fri Aug 02, 2019 2:15 pm	1	2468	Last post by James_Ball Fri Aug 02, 2019 2:38 pm
Dilution factor by Suraz » Fri Jul 19, 2019 3:33 pm	2	3528	Last post by Suraz Mon Jul 29, 2019 2:16 pm
Humic Acid cleanup in 8270/625 extracts by James_Ball » Tue Jul 23, 2019 7:20 pm	3	2992	Last post by LALman Fri Jul 26, 2019 12:34 am
Pierce C18 tips vs. home made StageTips/microcolumns by gvudrun » Mon Jul 01, 2019 12:17 pm	0	3391	Last post by gvudrun Mon Jul 01, 2019 12:17 pm
New Purge & Trap for EPA 524.3- Advice on manufacturer? by ciemnla » Sun Jun 02, 2019 7:24 pm	2	3184	Last post by ciemnla Sun Jun 09, 2019 1:12 pm
Sample prep for acetaminophen in water by LCMSMS using SPE by hts123 » Tue May 14, 2019 9:54 am	4	3320	Last post by Aldijkhuizen Tue May 21, 2019 6:43 pm
Sample intake for premixtures by Rndirk » Wed May 08, 2019 7:23 am	4	3192	Last post by James_Ball Thu May 09, 2019 7:34 pm

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