Fonkymonky
GLP-1 Apprentice
Thanks! 🙌
Syringe Filter
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noteablequotable
GLP-1 Specialist
If you're worried about lost product the Peptide Test YouTube channel has a good video on this. Makes sense that you lost very little water.
I don't think that material is recommended for peptides. I think PES is what you want.Here's a link to some .22um 4mm filters. 200 pack for $100... Not sure if any of you are familiar with the brand or have previously tried.
PTFE Single Layer (DX) Non-Sterile, Syringe Filter, 0.22um, 4mm Diameter, 200/unit
Shop Filtrous PTFE Single Layer Syringe Filter, 0.22µm, 4mm, featuring a dual-layered PTFE membrane for enhanced filtration efficiency. Compatible with nearly all solvents and designed to handle high backpressure. DNase/RNase-free and non-pyrogenic for reliable, contamination-free sample...filtrous.com
Not so much worried as surprised at how little I lost. Folks are really trying to hunt down the 4mm, but I think the 13mm appear to do just fine.
Fonkymonky
GLP-1 Apprentice
I ordered the 25mm. Do you think it makes a big difference?
Someone please correct me if I'm wrong, but my understanding is that .25mm doesn't work well at all for the small volumes we're dealing with when reconstituting peptides. The amount that stays behind in the filter is something close to a ml.
It will, but still maybe not as much to make a difference to you, though I’m not you. Looking at the cobetter site, it says the “hold-up volume” is less than 25 microliters for the 13mm, less than 100 microliters for the 25mm.
So I think you’ll notice a little bit, but we’re talking microliters. How much does that little bit matter to you? And those numbers are pre-purge, I think. (Don’t quote me, I haven’t worked in a lab since 2012 and even then I wouldn’t have quoted me.)
and piggybacking off of the last person, the site says the 25mm are best for samples 10ml to 100ml, so idk
I’m looking at couple other sites and they say their 25mm can be used for as little as 2ml, with a hold up volume of less than 50 to as much as 115 microliters, so maybe it’s brand specific?
bradyfan127
GLP-1 Novice
Thanks for letting me know. I've been going back and forth on this. Chatting on another board and reading information on here has actually helped. I've only been here one day and the conversation is WAY WAY more productive.
Hydrophilic PVDF also has an affinity for low-protein binding. PVDF is typically hydrophobic so make sure the filter is treated so it’s hydrophilic.
Filters of the same diameter/material from different manufacturers may have different holdback volumes. The key, from my experience, is to purge with bac water and air so the concentration of the filtered peptide remains unchanged.
Filters of the same diameter/material from different manufacturers may have different holdback volumes. The key, from my experience, is to purge with bac water and air so the concentration of the filtered peptide remains unchanged.
AnnSolo771
GLP-1 Apprentice
Peptide Test does have the syringes in stock now/today - and you can buy singles for $1.60ea. If you spend $40 (25 PES syringes), shipping is free. I just ordered and will get mine soon. I already have sterile Luer lock needles. Sterile vials also ordered from Medical and Lab Supplies (25/5ml for $41 +shpng/tax). They only had 2ml, 5ml and up. I had not been filtering but thinking ....why not? Looks simple enough if carefully done and I think better to filter than to not for my RS.
noteablequotable
GLP-1 Specialist
noteablequotable
GLP-1 Specialist
I was going to get an auto injector for insulin pens but this is what I actually want. I just wish they had instructions because I have no clue what I need and in what quantities.
What specifically are you unsure on? If you look at Peptide Tests youtube channel (video posted earlier is from him) he has videos explaining the process. In the case of using a PepPen, you would just sub the vial sent with the PepPen in for the sterile vile he uses in the video. He explains what you need to do it as well.
The PepPen site has videos on filling/using the pens as well.
Chizikitide-1977
GLP-1 Enthusiast
I got a HUMAPEN off aliexpress.us but I haven’t used it yet so can't comment other than it's cheap.
Aliexpress.us has the exact same pens the sell on peppens as well at like half the cost, but i dont have a link handy. Peppens is just a reseller.
You can check out the Peppen thread on hear...In that thread we have already posted a lot of the videos.
PepPens
I have bought from both USP Supply and PepPens and had a great experience with both.
I bought my pens from PepPens when they were having a 1/2 off sale so I got mine for $15/each 🙂
AliExpress is usally around $18 and a longer wait but lower shipping costs.
I think EZP Supply is still running 20% off if you join their Telegram Channel which brings the price down to $24/per pen.
PepPens
I have bought from both USP Supply and PepPens and had a great experience with both.
I bought my pens from PepPens when they were having a 1/2 off sale so I got mine for $15/each 🙂
AliExpress is usally around $18 and a longer wait but lower shipping costs.
I think EZP Supply is still running 20% off if you join their Telegram Channel which brings the price down to $24/per pen.
noteablequotable
GLP-1 Specialist
Thank you! I am going to take a look now 🏃♀️💨
Also forgot to mention I had just saw they are doing a prebuy on this website for pens at $15
https://shop.yeffopep.com/
I have not ordered from there before but I see them in a lot of the channels and SEEMS reliable.
Also if you need them VERY quickly it may not be the right answer for you.
Also don't know what shipping costs would be but if you start an order it may tell you. 👍
bradyfan127
GLP-1 Novice
Love MedEx so far as BAC Water (pack of 25 Pfizer for $86)... syringes... Alcohol swabs... Umm pretty much everything I need (for the most part).
Definitely a solid place to stock up.on Bacteriostatic Water, 30mL (25 pack). Super cheap.
medexsupply.com
Definitely a solid place to stock up.on Bacteriostatic Water, 30mL (25 pack). Super cheap.
Search results
medexsupply.com
Love MedEx so far as BAC Water (pack of 25 Pfizer for $86)... syringes... Alcohol swabs... Umm pretty much everything I need (for the most part).
Definitely a solid place to stock up.on Bacteriostatic Water, 30mL (25 pack). Super cheap.
Search results
I think I'll order through them next time. My AMSCO order is still "processing" and it's almost 2 weeks. Hopefully MedEx will still be around in 3 years when I need more Bac Water.
moonpies4misfits
GLP-1 Specialist
Mine still showed as processing the day it was delivered
Anyone know if these vials are OK? I'm new to syringe filters. Also thinking maybe not necessary, but why not?
PepOhio, did you end up purchasing these lure lock syringes and needles from Amazon? Or do you have a better source? Did anyone else buy from another place?
Because of the delivery times listed at the time, I ordered the ones from Biomed Scientific sold on Walmart but fulfilled and shipped by Biomed Scientific from earlier in the thread.
https://glp1forum.com/threads/syringe-filter.1100/post-13436
Just showed up yesterday. Plan on experimenting this weekend since I want to use filtered peptides for a while starting next week.
If I could have gotten them quicker at the time I would have ordered the Cobetter ones since they are better known. Depending on how I feel about the losses when I experiment I will either order 13mm Cobetter next time or preferably 4mm ones mentioned above if they are in stock and available again at a good price.
BeardedGuy
GLP-1 Apprentice
BeardedGuy
GLP-1 Apprentice
Make sure you’re getting Hospira brand Bac water.
And https://www.peptidetest.com/lab-supply
It’s a good source for filters and such
parradice
Recently Joined
Their site also shows BAC water along with the filters. The vial shows Hospira. Can I assume Peptidetest is reliable with their BAC aswell? They have the cheapest individual vials for sale at 7.
BeardedGuy
GLP-1 Apprentice
I’m sure what they’re selling is solid.
