Category: Lab Insights

When analytical results are unreliable and the instrument checks out, the problem frequently traces back to the water. Type 1 water is defined by a resistivity ceiling (a measure of how few dissolved ions remain in the water) of 18.2 MΩ·cm at 25°C, but that number describes only ionic purity. A system can read 18.2…

When analyzer performance drifts and calibration results look inexplicably off, water quality is rarely the first suspect. Clinical laboratory water is a reagent, not a utility. Contaminants at concentrations too low to detect visually can suppress enzyme activity, inflate fluorescence signals, or clog the narrow-bore manifolds inside modern analyzers. CLSI addresses this through GP40, a…

Water moves naturally toward impurity. Left to its own devices, it flows from cleaner to dirtier, pulled by the chemical tendency known as osmosis, a process that has been driving water across membranes in living cells for billions of years. Reverse osmosis works against that tendency entirely. By applying external pressure to water on the…