AlexDavis43
Member
NPP by QSC two samples November 2024
I have paid for the purity test do you feel like it would help the cause if we use the meso fund to get GCMS on both?
They are the same one
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NPP by QSC two samples November 2024
I have paid for the purity test do you feel like it would help the cause if we use the meso fund to get GCMS on both?
No they are not, look sample 1 and sample 2They are the same one
Thank you for the detailed comments. While I give them the attention they deserve here's some related data for oils in case you had not seen it.Very important typo. I meant to say fairly inaccurate. Thank you @readalot for bringing this to my attention.
Long story short, I decided to do some basic statistics. Note the uncofindence in my statement — these kinds of statements are closer to "more likely than not" rather than "95% confidence". This is mainly due to the small sample size (~10) more than anything. Again, the conclusion is supposed to be that GCMS area is not accurate rather than is.
Longer explanation:
We have two methods that are essentially measuring purity, some more accurate than others. If we make three basic assumptions, we can do some comparative statistics like lims of agreement. We do this by making a table of GCMS vs HPLC data (of the same samples) and then comparing.
Assumptions:
First: All samples are thoroughly mixed and consistent throughout, especially when one individual sends two samples for testing. This is less likely with bodybuilders rather than actual researchers, but still expected.
Second: Jano's hplc is indeed very accurate, other than confusing very similar compounds like d4,6.
Third: There are no significant quantities of involatile substances. This is the least certain, but is still likely due to how organic synthesis works practically.
If so, we can create a spreadsheet with 2 columns. For the HPLC column, we just write the purity. For the gcms, we add any compounds' areas that will almost certainly coelute on hplc (in general this is only testosterone and d4,6 - see below for more info). Then we just compute the residuals, do some altman analysis, etc. While the statistical power is lacking with only n=~10, it can still tell us a lot. Honestly, if anyone here has any time, please make a spreadsheet of any janoshik reports that you have of the same sample, with gcms and hplc. If we can get enough data, we could even do cluster analysis and find patterns with Jano's testing, possibly even with vendors.
This is a bit less scientific, and is mostly a combination of: how likely two molecules are to coelute based on structure (in the case of d4,6, I would say the damning aspect is that the double bond is in very close proximity to the d4 bond, unlike modifications far away from it like boldenone or nandrolone) and published data, how the hplc raw data looks (especially the chromatograms, I actually think that I saw a shoulder peak on one), how it compares to the gcms, etc. Its a bit hard to explain, but at minimum I haven't seen anything nearly as flagrant as the d4,6 and testosterone.
| A | B | C | D = A - C | E = D / A | ||
| HPLC MG/ML | GCMS % | B * 1000 | Variance | Variance % | ||
| PRIMAL | TC | 204 | 19.98% | 199.8 | 4 | 2% |
Hold up. My AI app subscription lapsed. Give me a little bit.100% im the least experienced here so great to pick up some info.
for me on this test
They're 32 h apart, but retention times is almost similar. so i dont think the mz difference is the culprit but the retention times. base peak is also 11k vs 15k
maybe ghoul has some good recommendations.Hold up. My AI app subscription lapsed. Give me a little bit.
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@Photon got it tighter and no point in arguing about overfitting on a forum but to your point. GCMS API% and HPLC mg/ml correlation very tight.While the statistical power is lacking with only n=~10, it can still tell us a lot. Honestly, if anyone here has any time, please make a spreadsheet of any janoshik reports that you have of the same sample, with gcms and hplc
Haven't went through your latest data. I would say yes.So? Instead of spamming shit what should I tell Jano GCMS yes or not?
I mean the fucking thread is already a mess without us spamming gif, don't you think?
Asked for raw data on both and GCMS on sample 1 ( the least pure)Haven't went through your latest data. I would say yes.
Should be spending my time here. You are right. TBF, I am human.Asked for raw data on both and GCMS on sample 1 ( the least pure)
Asked for raw data on both and GCMS on sample 1 ( the least pure)
the autoid name by gcms was inaccurate.From what I vaguely recall: the issue was NPP contaminated with something like TNE, but TNE didn't show up on HPLC...?
Maybe it's thermal caused by GC? Maybe HPLC can't distinguish between 5 and 6?Hi @janoshik
We have the following raw purity % and gcms.
Per GCMS, it looks like there are test degradation products.
Is this treated as TNE in HPLC?
Is there a way to get the true purity of just TNE?
View attachment 351950
View attachment 351949
How dare you impugn those 99+% raws!!i wouldnt be too happy about that 70% percent if i was b ware
this is like the highest area % we found yet. and even if gcms isnt calibrated for api% i dont think the error magin is bigger than 10% at most!
How dare you impugn those 99+% raws!!
This vendor uses 1H NMR to qualify those righteous anabolic powders. Says so right here.
Probably just got "overheated" a bit during shipment. Quality stuff.



Pristine, isn't it?AFAIK they only used HPLC n MS
MESO-Rx Sponsor Post in thread 'Genuine Steroid Powder Manufacturer-AASraw'
Product: Nandrolone phenylpropionate powder
CAS: 62-90-8
Loading time: October
It has been tested by labs and the quality was confirmed.
Please find HPLC and MS reports below:
HPLC report(High-performance liquid chromatography ) is to show how the purity is of the compound: High-performance liquid chromatography - Wikipedia
MS report(Mass Spectrometry) is to identify what the compound is: Mass spectrometry - Wikipedia
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