Endotoxin assay interference and suitability testing
Understand inhibition, enhancement, spike recovery and why an immediate control does not answer every sample-storage question.
Read the article →Research Hub
Explore peptide science, analytical testing and the documentation behind research materials.
500 articles to explore
Bioburden testing of research materials
Understand recoverable microbial counts, the meaning of CFU and why methods with different detection principles need careful comparison.
Read the article →Microbial identification after a positive test
Understand how identification adds information after detection, and why a species name alone does not establish the source of contamination.
Read the article →Visible particle inspection of laboratory solutions
Understand why visual particle detection depends on the particle, solution, container and inspection conditions.
Read the article →Subvisible particle counting in laboratory solutions
Understand light-obscuration and flow-imaging counts, size-bin conventions and the effects of optical contrast.
Read the article →Container closure integrity testing explained
Understand package-barrier measurements, challenge controls and why a leak test is distinct from testing the contents for microbial growth.
Read the article →Analytical accuracy and precision
Separate agreement with a reference from agreement between repeats, and recognise why a tight result can still be biased.
Read the article →Repeatability and intermediate precision in peptide assays
Understand which sources of variation are included when an assay is repeated within a run or across days, operators and equipment.
Read the article →Analytical specificity in complex peptide samples
Understand how an assay distinguishes the intended peptide from related compounds and other signals in the sample.
Read the article →Linearity and working range of peptide assays
Understand why a strong calibration correlation is not enough, and how the supported measurement range differs from the range of prepared standards.
Read the article →Robustness studies in analytical methods
Learn how deliberate changes reveal fragile analytical conditions, and why a stable assay value alone may miss a loss of separation.
Read the article →Carryover in peptide analytical runs
Understand how a previous injection can distort a later peptide result, and why a small carryover percentage can matter at low concentrations.
Read the article →