scarywood75
Member
Luer lock are Luer slip compatible usually, they just don't screw but stay in place with friction
Syringe Filter
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ah yes, good catch. think i'm gonna have to give up on the idea of a 4mm 0.22um filter.....
Just so I am clear about this -
lock syringe + lock needles will work. no need at all for a slip needle?
thank you
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Hey, does 4mm really work up to 4ml? Everything i've seen online has mentioned 1-2ml max. Wondering if you've tried 3-4ml personally.
Correct. You can buy a set (syringe & needle) already together and then a pack/box of needles for after you attach the filter, but they don’t need to be slip.Just so I am clear about this -
lock syringe + lock needles will work. no need at all for a slip needle?
thank you
If you’re looking for sterile 4mm filters, Peptest sells them. Do note, every filter has different specs. I use 13mm and they suit me just fine.
Chizikitide-1977
Member
Revo posted a source for 4mm filters yesterday for relatively cheap.
Spoke to Peptide Test today as I'm a newbie to all this and have a shopping list of supplies for extended travel. They couldn't have been more helpful and advised that Tisch will be shipping 2mm 0.44um PES filters from their factory on Friday, which means should be at Peptide Test's warehouse by the end of next week. I went ahead and placed an order with PT and, as need filters in a relative hurry, paid an extra $4ish for Priority 2-day shipping. Fingers crossed it all works out, but am fairly confident it will.
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I didn't see the sterilized ones on the website. I wonder if the Tisch are sold out.
They ran out, yes. From what I understand, they're manufacturing more to be sold exclusively by Peptide Test.
GimmeABreak
Registered
I filtered 3ml into a cartridge with a 4mm filter last night and had no issues.
Chizikitide-1977
Member
Huh. So if I'm readingthis right, then he's going to have a monopoly on the filters he's going around telling everyone to use on every peptide forum on earth.
I'd really like to give this guy the benefit of the doubt, but stuff like this makes it difficult.
that's not what i would consider a monopoly... it sounds like he's just gonna have an agreement to purchase their items in bulk regularly (so he's a step above retail, essentially a preferred customer). there's zero chance he pushes enough weight for an experienced company to award exclusivity like that.
Chizikitide-1977
Member
Hopefully that is the case. But the previous comment made it sound like it was exclusive. Like I said I'd really like to give the guy the benefit of the doubt.
he's had back order supply issues all month so while i'm obviously not peptidetest guy and can't say for sure, i feel like 99% certain that it's just an agreement to make sure he doesn't get left empty handed again. he's definitely lost out on business due to this backorder problem so far and his shipping has been a nightmare thanks to having to split orders into multiple shipments (since he sells bacwater too which is in high demand). and for all the studies/tests he's been doing (and posting to youtube) it makes sense why he would want to secure a steady supply from his preferred brand of choice.
GimmeABreak
Registered
I was always under the impression PT sells these as a way to market his testing services. There is a good chance users that care enough to filter will eventually have a need to get their peps tested.
It's hard to even turn a profit will multiple low-dollar orders and I don't think he has a minimum order quantity. If he is making 50 cents a filter and the average user orders 10 it is a lot of labor to handle the order, stock/reorder, deal with questions, pack and ship just to make $5.
I really view it as a service he is providing to keep us safe and healthy (just like his testing service). When I saw they were in stock last month I just grabbed 100.
How do I get ahold of westend?
and it's near-impossible to find 0.22um 4mm PES filters from any known manufacturer/wholesaler (in the US), or at least I found it difficult. there's Biomed and that's about it. seems like the supply is extremely limited (I suspect 4mm has only very limited applications) and he's providing a service for barely any money. I mean earlier today he spent a good ten minutes giving me great advice and that was for a $40 order with free shipping!
Chizikitide-1977
Member
That all sounds reasonable, but there is still a marketing angle there. He is steering everyone to 4mm filters and whether he is making money off the filters or making money off tests from people who find out about his lab service because he sells filters, there is still a conflict of interest there and a scientific lab should be cognizant of that.
Fwiw I really don't take issue that he is selling these filters. But I'm not crazy about some of the posts I've seen from him on various boards saying that only the 4mm filters make sense in such definitive terms (especially since so many other reports as well as my own experience show that losses for 13mm are being overblown). And I'm definitely not the only one, this stuff has raised more than a few eyebrows in multiple peptide communities.
I just think those working in a scientific field need to be very careful about these types of things and always be transparent when there is a conflict of interest.
This was the response form the company about individual sterile filters
SF17512 is not sold as a sterile product, it does not have individual packaging. However, if needed, you could sterilize and repackage them upon receipt. they can be autoclaved at 121C for 30 minutes or undergo 5kg Gamma for 8 hours.
If you have any other questions, please let me know.
Thank you,
Samantha Anderson
Tisch Scientific
Customer Advocate
513-467-0222
I have an autoclave at the office so it's not an issue for me. Could instantpot a couple see how it does also ?
