What is dead volume in a peptide cartridge?

Dead volume is the liquid that stays trapped in the cartridge after you draw what you need, usually 0.1-0.4ml depending on cartridge design.

Glass vs plastic cartridge for peptides?

Neither glass nor plastic is perfectly inert: glass flakes due to chemical delamination have been observed in parenteral liquid formulations after long-term storage (Jiang et al. 2013), the unpredictable nature of peptide binding to surfaces requires optimization of experimental containers (Goebel-Stengel et al. 2011), and cetrorelix adsorbed more to glass than to polypropylene (Grohganz et al. 2004).

How do I calculate correct peptide concentration with cartridge dead volume?

Subtract the dead volume from your total diluent added, then calculate concentration based on the usable volume actually in your vial.

PreppinPeppers › Facts › Lab article

Why your 3ml peptide cartridge might hold less than you

Machine-readable facts for this Lab article. The full page is https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you.

TL;DR

Dead volume is the liquid left trapped inside a cartridge after withdrawal. In a 3ml cartridge it typically takes 0.1ml to 0.4ml of the nominal capacity.

Facts Index

Fact ID	Category	Entity	Attribute	Value	Source
why-your-3ml-peptide-cartridge-might-hold-less-than-you:title	identity	Why your 3ml peptide cartridge might hold less than you	title	Why your 3ml peptide cartridge might hold less than you	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:published	identity	Why your 3ml peptide cartridge might hold less than you	published	2026-08-15	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:author	identity	Why your 3ml peptide cartridge might hold less than you	author	Preppin' Peppers Editorial Team	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:topics	identity	Why your 3ml peptide cartridge might hold less than you	topics	3ml cartridge, peptide pen, reconstitution, research	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:summary	content	Why your 3ml peptide cartridge might hold less than you	summary	Dead volume is the liquid left trapped inside a cartridge after withdrawal. In a 3ml cartridge it typically takes 0.1ml to 0.4ml of the nominal capacity.	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-1	content	Why your 3ml peptide cartridge might hold less than you	section	What dead volume is	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-2	content	Why your 3ml peptide cartridge might hold less than you	section	What actually determines usable volume	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-3	content	Why your 3ml peptide cartridge might hold less than you	section	Glass vs plastic: the purity question	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-4	content	Why your 3ml peptide cartridge might hold less than you	section	Pen compatibility and what "3ml" really means	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-5	content	Why your 3ml peptide cartridge might hold less than you	section	The mistakes that cost researchers the most	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-6	content	Why your 3ml peptide cartridge might hold less than you	section	What actually matters when you're at the bench	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:section-8	content	Why your 3ml peptide cartridge might hold less than you	section	What the research community gets wrong about 3ml peptide cartridges	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:source-pubmed-ncbi-nlm-nih-gov	source	Why your 3ml peptide cartridge might hold less than you	cites	Jiang et al. 2013 - pubmed.ncbi.nlm.nih.gov	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:source-pmc-ncbi-nlm-nih-gov	source	Why your 3ml peptide cartridge might hold less than you	cites	Goebel-Stengel et al. 2011 - pmc.ncbi.nlm.nih.gov	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:source-pubmed-ncbi-nlm-nih-gov-2	source	Why your 3ml peptide cartridge might hold less than you	cites	Grohganz et al. 2004 - pubmed.ncbi.nlm.nih.gov	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:product-gansulin-metal-peptide-pen	products	Why your 3ml peptide cartridge might hold less than you	references product	Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units)	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:product-gansulin-3ml-cartridge	products	Why your 3ml peptide cartridge might hold less than you	references product	Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack)	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)
why-your-3ml-peptide-cartridge-might-hold-less-than-you:source-pubmed-ncbi-nlm-nih-gov-3	source	Why your 3ml peptide cartridge might hold less than you	cites	Jenke, Expert Opin Drug Deliv 2014: Extractables and leachables considerations for prefilled syringes - pubmed.ncbi.nlm.nih.gov	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-your-3ml-peptide-cartridge-might-hold-less-than-you) (evidence)

FAQ

What is dead volume in a peptide cartridge?: Dead volume is the liquid that stays trapped in the cartridge after you draw what you need, usually 0.1-0.4ml depending on cartridge design.
Glass vs plastic cartridge for peptides?: Neither glass nor plastic is perfectly inert: glass flakes due to chemical delamination have been observed in parenteral liquid formulations after long-term storage (Jiang et al. 2013), the unpredictable nature of peptide binding to surfaces requires optimization of experimental containers (Goebel-Stengel et al. 2011), and cetrorelix adsorbed more to glass than to polypropylene (Grohganz et al. 2004).
How do I calculate correct peptide concentration with cartridge dead volume?: Subtract the dead volume from your total diluent added, then calculate concentration based on the usable volume actually in your vial.