Chemical Standards

Select a standard based on the specific analyte(s), required concentration range, solvent compatibility, and calibration method; verify certificate of analysis (CoA) details such as purity, expiration date, and storage conditions to match your laboratory protocols

Standards are commonly available as single-component solutions, multi-component mixes, solids, or ampoules, with concentrations ranging from trace levels (ppb) to percent-level solutions; choose the format that minimizes handling and matches your instrument sensitivity and calibration needs

Follow manufacturer storage instructions on the label or CoA—typical requirements include refrigeration or freezing for volatile or unstable compounds, protection from light, and using clean, compatible glassware; avoid repeated freeze-thaw cycles and record lot and opening dates for traceability

Expect a certificate of analysis listing identity, purity, assay method, uncertainty, expiry or retest date, lot number, and storage/handling recommendations; additional documentation may include safety data sheets (SDS) and traceability statements to primary references

Yes; lower-cost options include single-component standards at common concentrations or small-volume ampoules for routine checks, while multi-component mixes can reduce per-analyte cost for multi-target assays; balance cost with required accuracy and documentation

Check that the solvent matrix, concentration, and potential contaminants are compatible with your instrument (e.g., GC, LC, ICP), that the standard can be introduced by your sample prep method, and that its concentration falls within the instrument's calibration range

Common causes include exposure to light, oxygen, heat, or moisture; signs of degradation are unexpected changes in assay results, visible precipitation or color changes, and altered chromatographic peak shape or retention time—validate with fresh standard or reference check when in doubt