labware
Volumetric flasks and class A markings
How to use a Class A or Class B volumetric flask, including to contain or to deliver, the reference temperature, and the meniscus.
8 October 2026 · 8 min read
Knowledge centre
Methods a laboratory can check.
Guides, method explainers and sourcing notes for research laboratories. Written by the EVRINTH Editorial Team from published methods, with catalogue links for enquiry rather than stock claims.
All topicsBuffers and laboratory water26Cell culture26Chromatography26Cold chain and sample storage26Cytometry and microscopy26DNA sequencing26Gels and blotting26Gene expression26Genome editing26Immunoassays26Laboratory labware26Laboratory safety26Liquid handling26Microbiology26Molecular cloning26Nucleic acid purification26PCR and amplification26Protein biochemistry26Proteomics26Research sourcing and study design26
cold chainbiosafetycrisprspecificationsequencingproteomicsenquiryglossarytroubleshootingcloningmicrobiologybuffersfreezerspipettingcalibrationelisacell cultureglassware
520 articles
buffers and water
Volumetric preparation versus top-up habits
A volumetric flask is calibrated at a stated temperature, often 20 °C. Dissolving below the mark and topping a beaker by eye are different kinds of promise.
8 October 2026 · 8 min read
laboratory safety
Waste streams chemical biological and ordinary
Chemical, biological, sharps, and ordinary waste fail when they share a container. Follow one afternoon and see where the streams must stay apart.
8 October 2026 · 8 min read
cell culture
Water baths as a contamination source
How a warm water bath seeds a culture: from the water, onto a vial thread, into the cabinet and then the flask, and which thaw classes avoid shared water.
8 October 2026 · 8 min read
buffers and water
Weighing hygroscopic salts
Weigh the hydrate printed on the bottle. Humidity adds water to the pan, and an invented drying step can destroy the solid you meant to keep.
8 October 2026 · 9 min read
immunoassays
Western blot as an antibody specificity check
What a western blot band can and cannot say about antibody specificity, and which extra lanes make an ELISA claim safer to defend.
8 October 2026 · 8 min read
gels and blotting
Western blot from gel to membrane
How a protein moves from an SDS gel onto a membrane, how antibodies create a band, and which controls separate transfer failure from a real signal.
8 October 2026 · 8 min read
nucleic acid purification
What a 260/280 ratio does not prove
Read a 260/280 ratio as a protein-contamination hint, and see why the number cannot prove integrity, species identity, or that a later PCR will succeed.
8 October 2026 · 9 min read
liquid handling
What a calibration certificate does and does not say
Read a pipette certificate for date, reference, volumes, and errors, and judge when a later drop or heavy use ends that claim.
8 October 2026 · 7 min read
chromatography
What a chromatogram is showing
Decide what a chromatogram can support: a detector trace versus time or volume, and why one peak is not a purity result.
8 October 2026 · 8 min read
gene expression
What a differential expression table contains
Which columns in a differential expression table a biologist should question, including fold-change sign, adjusted p and identifier collisions.
8 October 2026 · 9 min read
proteomics
What a proteomics report should state
A proteomics report a second lab can audit names groups, digestion, the database version, FDR cut-offs, normalisation and the missing-value rule.
8 October 2026 · 8 min read