[Medutest] SWB sema — 98.2%, cold chain intact, 9 days transit
Posting this because the title is the whole finding — SWB sema — 98.2%, cold chain intact, 9 days transit — and a number without its method is a rumour.
The numbers the title promised, since a headline without them is worthless: 98.2% and 9 days. Everything below is context for those.
Have now spent more on testing than on some of the orders. No regrets — the log is the reason I can buy without agonising.
Sent a vial in specifically to check a supplier’s claim after a good experience. It matched. Boring result, worth logging.
Tell me where this is wrong. That is the useful part of posting it.
- SWSWB source pageShanghai Wibson Biotechnology Co., Ltd. · Shanghai · 96% here, rank 4 · shop at shanghaiwibsonbiotechnology.net →
nofollow and sponsored; nobody here is paid for it.best — the order this archive was captured in
A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions.
the log is cumulative, that is the whole value of it
What a result posted here is actually worth, and how to make yours worth more.
A single figure with no batch identifier is about a vial nobody can locate. Add the batch and it becomes about a lot. Add the claimed figure from the certificate and it becomes a comparison. Add the service and the date and it becomes reproducible. Say that you paid for it yourself and it becomes independent.
Five extra fields, thirty seconds of typing, and the difference between a comment and a row in the log that will still be useful in three years.
First result I ever posted here got asked for the batch number and the claim. Fair, and my posts have been better ever since.
How to build a series that means something, if you are going to spend money on testing anyway.
Three tests on one lot tells you about your measurement. Three tests on three lots, spread over a year, tells you about a process. The second is the one worth paying for and it costs the same.
Buy small, keep the batch numbers, send one vial per lot, and post each one with the claim next to it. After four or five you have something no individual review can give you: a band, a direction and a date range. That is what the source pages are made of.
Small fix — same supplier, different lot. The two rows in the log are not the same batch.
Small fix — same supplier, different lot.
This is why the template has a batch field. Without it the result is about a vial nobody can identify.
Area percent or net peptide content?
Tested three lots over a year rather than three vials from one lot. Cost the same and told me something completely different.
Merged with the other thread on the same batch so the results sit together.
Fourth lot from the same supplier in the log now and the band has been tight the whole way. That consistency is the actual finding.
Push back: three tests on one lot is one lot. It tells you about that lot and almost nothing about the next one.
Yes — date of analysis, because a result from two years ago describes a different manufacturing month.
Merged with the other thread on the same batch so the results sit together.
peptidemeter_pat is right that the band matters more than the peak. Consistency across lots is the finding.
if you are going to test, test the thing you actually received
[deleted]
net peptide content if the report gives it, and say which you are quoting
peptidemeter_pat is right that the band matters more than the peak.
Adding the boring but useful bit: say whether you paid for it. It is the basis of the whole log.
Adding the boring but useful bit: say whether you paid for it.
Disagreeing with this line: that gap is ordinary variance, not a contradiction between the lab and the certificate.
results without method are gossip with decimals
- 1Merged with the other thread on the same batch so the results sit together.11 comments in this branch · started by u/peptidemeter_pat