Cleaning Glass Between Salt Tests
Q. What do you recommend for cleaning glass equipment between salt tests? We are removing inorganic salt residue. A. There are many kinds of salt tests, such as corrosion, resistance, conductivity or solubility. When removing inorganic salt residue from a glass substrate, such as sodium chloride, calcium chloride, calcium carbonate or magnesium carbonate, we recommend…
Replacing Bleach in Removal of DNA
Q. We need to remove all DNA from material, bleach destroys DNA, but we use a lot of it. Any Alconox-type cleaners that can completely remove/destroy DNA without the bleach step? Click to read the answer.
Water Spots & Oil Removal: Pharma & Lab Glassware
Q. We see white water spots on cleaned and depyrogenated vials. Looks to be scale from the washer. Do you have a recommended cleaning agent for vial washing? Click to read the answer.
Clouding Out in Citric Acid Passivation
Q. We are performing Citrajet passivation using the procedure found in your cell phone app. When finished, there are circles of “oil” floating on the Citrajet solution, even though our parts had no oil on them. Is this normal? A: What you are seeing is not oil, but low-foaming surfactant coming out of solution…..
All About Rinse Aids
There are basically three kinds of rinse aids: Hydrophobic rinse aids that leave behind a residue, surfactants that wet surfaces and allow rinse water to sheet off a surface without leaving behind droplets, and acid rinses that dissolve insoluble alkaline salt residues.