Buffers and Standards
Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.
The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:
- Red: pH 4.0
- Yellow: pH 7.0
- Blue: pH 10.0
HEPES Buffer, 1M Solution, pH 7.3 (Molecular Biology), Fisher BioReagents™
Commonly used buffering agent
Thermo Scientific Chemicals Iodine, 0.1N Standardized Solution
CAS: 7553-56-2 Molecular Formula: I2 Molecular Weight (g/mol): 253.81 MDL Number: MFCD00011355 MFCD00164163 InChI Key: PNDPGZBMCMUPRI-UHFFFAOYSA-N PubChem CID: 807 ChEBI: CHEBI:17606 SMILES: II
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Gibco™ CTS™ DPBS, without calcium chloride, without magnesium chloride
Gibco Cell Therapy Systems (CTS) DPBS is the classic Dulbecco's phosphate-buffered saline. This particular formulation lacks calcium, magnesium, and phenol red.
Invitrogen™ Tris (1 M), pH 8.0, RNase-free
Invitrogen Molecular biology grade, 1M Tris, pH 8.0 solution is supplied in one bottle. The buffer is certified RNase-free, economical, and ready-to-use.
Sodium thiosulfate, 0.01N Standardized Solution
CAS: 7772-98-7 Molecular Formula: Na2O3S2 Molecular Weight (g/mol): 158.10 MDL Number: MFCD00003499 InChI Key: AKHNMLFCWUSKQB-UHFFFAOYSA-L Synonym: sodium thiosulfate,sodium thiosulphate,disodium thiosulfate,sodium thiosulfate anhydrous,hypo,sodiumthiosulfate,chlorine cure,chlorine control,declor-it,thiosulfuric acid, disodium salt PubChem CID: 24477 IUPAC Name: disodium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane SMILES: [Na+].[Na+].[O-]S([S-])(=O)=O
Fluoride Standard, 100 ppm F-, Fisherbrand
CAS: 7681-49-4 Molecular Formula: FNa Molecular Weight (g/mol): 41.99 MDL Number: MFCD00003524 InChI Key: PUZPDOWCWNUUKD-UHFFFAOYSA-M PubChem CID: 5235 ChEBI: CHEBI:28741 IUPAC Name: sodium fluoride SMILES: [F-].[Na+]
Invitrogen™ TE, pH 8.0, RNase-free
Invitrogen molecular biology grade, TE, pH 8.0 solution is supplied in one bottle containing 500 mL. The buffer is certified RNase-free, economical, and ready-to-use.
Gibco™ PBS, pH 7.4 (flow cytometry grade)
Phosphate-Buffered Saline (PBS) is a balanced salt solution used for a variety of applications, including reagent preparation, diluting cells for flow cytometry and as a cell culture reagent.
TAE Buffer, Tris-Acetate-EDTA, 10X Solution, Electrophoresis, Fisher BioReagents
Hydrochloric acid, 0.1N Standardized Solution
CAS: 7647-01-0 Molecular Formula: ClH Molecular Weight (g/mol): 36.46 MDL Number: MFCD00011324 MFCD00792839 InChI Key: VEXZGXHMUGYJMC-UHFFFAOYSA-N PubChem CID: 313 ChEBI: CHEBI:17883 IUPAC Name: hydrogen chloride SMILES: Cl
TE Buffer, Tris-EDTA, 1X Solution, pH 7.4, Molecular Biology, Fisher BioReagents™
Tris-EDTA (TE) is routinely used for suspending nucleic acid samples.
Hydrogen peroxide, 35% w/w aq. soln., stab.
CAS: 7722-84-1 Molecular Formula: H2O2 MDL Number: MFCD00011333 InChI Key: MHAJPDPJQMAIIY-UHFFFAOYSA-N Synonym: oxydol,perhydrol,superoxol,interox,hydrogen dioxide,inhibine,peroxaan,albone,hioxyl,kastone PubChem CID: 784 ChEBI: CHEBI:16240 IUPAC Name: hydrogen peroxide SMILES: OO
Isopropyl Alcohol Solution, LC-MS, For flushing LC-MS systems, 50/50 Isopropyl Alcohol / Water, Solstice
CAS: 67-63-0 Molecular Formula: C3H8O Molecular Weight (g/mol): 60.096 InChI Key: KFZMGEQAYNKOFK-UHFFFAOYSA-N Synonym: isopropanol,2-propanol,isopropyl alcohol,2-hydroxypropane,alkolave,avantine,hartosol,dimethylcarbinol,sec-propyl alcohol,petrohol PubChem CID: 3776 ChEBI: CHEBI:17824 IUPAC Name: propan-2-ol SMILES: CC(C)O
Water with 0.05% Trifluoroacetic acid, LabReady™ Solvent Blend, Solstice
CAS: 7732-18-5 Synonym: water,dihydrogen oxide,distilled water,purified water,water vapor,sterile water,water, purified,water, deionized,water, mineral,dihydrogen monoxide