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HPC Standards: residue reference materials and isotope-labelled standards from Germany

HPC Standards GmbH is a DAkkS-accredited ISO 17034 reference material producer in Germany. Accreditation scope,...

HPLC solvent selection: acetonitrile, methanol or purified water?

In HPLC the solvent affects baseline stability, retention time, resolution and column life. How to...

How to read a chemical SDS: the 16 sections every laboratory should know

The safety data sheet is mandatory reading before a chemical is received, stored or used....

CRMs and reference standards: how to choose, store and use them correctly

Choosing the wrong standard can bias a result even when the instrument and technique are...

Chemical purity grades explained: AR, ACS, HPLC, LC-MS and technical grade

The same chemical name covers several purity grades. What each grade is for, and a...

Laboratory chemical inventory: FIFO, FEFO and clear labelling

Duplicate purchases, expired stock and lost lot traceability all come from weak inventory control. How...

Water for HPLC: why water quality changes your analytical results

Water is the main component of most reversed-phase mobile phases, and one of the most...

Reducing agents in organic chemistry

From mild reagents such as NaBH4 to powerful systems such as LiAlH4, the Birch reduction...

Analytical sample preparation: cutting cross-contamination and pre-treatment error

A great deal of analytical error arises before the instrument ever sees the sample. Common...

Storing flammable and volatile chemicals: the rules worth not skipping

Solvent vapour can ignite, cause exposure by inhalation and build pressure inside packaging. Storage principles,...