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Messages 57 - 86 of 417   Oldest  |  < Older  |  Newer >  |  Newest
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57
I am doing an analysis by ICP for trace amounts of iron in medium and I have not been able to obtain suitable internal standards. I am diluting a 1000ppm Fe ...
alc619
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Nov 5, 1999
2:29 am
58
Fe should not be a problem on ICP. Check all of your waters and acids for contamination. Run reagent blank and minus it from the results. Look for matrix ...
labagman
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Nov 8, 1999
2:16 pm
59
Hi, <br>I'm joined this club to get a better idea of what analytical chemistry is all about. I'm a junior in high school and I know that Chemistry is the field...
eyeluvrock
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Nov 11, 1999
5:08 pm
60
Thanks for the advice - I think it could possibly be matrix interference as it is a seawater medium, so there is KCl and NaCl present. I had to throw out 2...
alc619
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Nov 19, 1999
11:55 pm
61
Hi every body,, I'm Master student looking forword to make my project in edible oils and fats, specailly from soapatock,, I wish if anyone have the same idea...
mutaz_mekki
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Nov 22, 1999
6:25 pm
62
I want to start my own biotechnology/biochemistry/microbiology company. <br><br>I am looking for partners in Europe (preferably in Portugal). <br><br>Please...
BETTENZ
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Dec 1, 1999
4:44 pm
63
Try not to use glassware if you are looking for low PPB results . If acid is used in the mix it will leach out elements from the glass. We have problems with...
labagman
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Dec 16, 1999
7:41 pm
64
I am a Ph D. student and I need to come up with a topic for my orals anyone have any idea's as to what a good topic might be?...
HPLC_man
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Jan 18, 2000
10:45 pm
65
Looking for a topic relevant in the world today that can be examined by using HPLC,GC,AA,Mass spec, FTIR, UV vis, or IR. Fresh out of ideas and hoping an ...
messyjessi44
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Jan 22, 2000
4:04 am
66
I work in the San Diego area...I can tell you that most ofthe work here is in biotech/ pharmaceuticals, but it seems that you have lots of the skills needed....
jangy
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Feb 11, 2000
6:58 am
67
Hi, Nicole!<br><br>Since you're only a junior, you still have a reasonable amount of time to decide what area of chemistry to pursue, as examples: nuclear,...
meme_061370
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Feb 19, 2000
6:20 am
68
I work with RP HPLC, but I have very small amout of PCB in hexan which I would like to try analized with HPLC. I donīt have any expiriance with hexan on RP...
snjezanazubcic
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Feb 22, 2000
2:45 pm
69
snjezanazubcic.....I don't know PCB that well, but depending on how hydrophobic it is, you will need to find a running buffer that is miscible with ...
jangy
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Feb 22, 2000
11:27 pm
70
People,<br>Anyone who knows the contact number(s) of ASTM?<br>I need the test methods for petroleum testing.<br>Thanks.<br><br>JERRY...
jerry_poch
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Feb 24, 2000
7:52 am
71
Hello everybody!<br><br>Three years ago I discoverd chemometrics in order to interpret FTIR-Spectra of whole yeast-cells: cluster-analysis, principal ...
axeloide
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Feb 24, 2000
11:01 pm
72
I suggest that you try tetrahydrofuran as a solvent for your reverse phase separation. You have to make sure that your sample is miscible with the mobile phase...
darkarpar
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Mar 5, 2000
5:31 am
73
Anyone know the order of the reaction wrt hydrochloric acid and sodium thiosulphate in the corresponding reaction?...
schembrix
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Mar 6, 2000
12:25 pm
74
i just joined your club hoping that i learn alot. i am not very good in chemistry but i find it intriguing so if you all don't mind me a bum just hanging out...
dablakdespot
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Mar 12, 2000
9:09 am
75
Are there any other ocean surfing chemists out there, if so then come and join my club at<br><a href=http://clubs.yahoo.com/clubs/thesurfingchemistsclub...
Bil_can_a_bis
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Mar 15, 2000
12:38 am
76
Welcome aboard. Glad to have you. Ask away!...
octanediol
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Mar 28, 2000
6:22 pm
77
Welcome, fell free to ask anything you want....
sazer_98
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Mar 29, 2000
1:45 am
78
I think it is 1st order...
sazer_98
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Mar 29, 2000
1:46 am
79
Do you have access to GC?, if so you will be better of running it on the GC, where the PCBs' are low MWT. Compounds....
sazer_98
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Mar 29, 2000
1:55 am
80
I trying to do a cloud point extraction on pyrethrins for a CEC analysis but so far the surfactant (tx-114) mixture is not producing any readable results any...
messyjessi44
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Mar 29, 2000
2:54 am
81
One mole of thiosulfate ion reacts with one mole of hydronium ion to give one mole of sulfur, one mole of bisulfite ion and one mole of water. Do you know the...
octanediol
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Apr 4, 2000
6:40 pm
82
i need help with buffers can somone help<br>thanks...
pythoncurtus36
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Apr 17, 2000
8:30 pm
83
I have to go to a meeting right now, but I do want to help. What do you need to know: 1) calculate the pH of a particular buffer system; 2) calculate the new...
octanediol
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Apr 18, 2000
9:43 pm
84
Good morning/afternoon:<br><br>Columbia Analytical Services, Inc., an employee-owned, environmental testing laboratory, currently seeks qualified analytical ...
aashepard
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May 8, 2000
10:00 pm
85
Any 6890 experts out there? I am a new user with a problem. I am setting up a capillary column (5% PhMeSi) on a system with split/splitless injection and I ...
sddingman
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May 16, 2000
3:51 am
86
The rate determining step is the slowest reaction.<br>Do you any more data about this?...
pakistanicitizen
pakistanicit...
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May 18, 2000
12:08 am
Messages 57 - 86 of 417   Oldest  |  < Older  |  Newer >  |  Newest
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