Labware Cleaning: Solujet Leaving Ring
Q. It appears that the Solujet is leaving a ring on some of the labware that cannot be removed. What is this ring (sodium silicate?)? How do we remove it? The labware has not been completely submerged. We have just added the Solujet soak for some labware that may have stubborn organics. We have been giving the labware a 4 hour soak in 1% Solujet, followed by warm tap water rinse then wash with Liquinox followed by 3x DI rinse.
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Laboratory Cleaning: Alcojet Detergent not Dissolving in Washer
Q. Alcojet is not dispensing/dissolving in my lab washer. Do you know why this would happen?
A. When this happens to customers, the most common cause is putting Alcojet into a wet dispenser cup. The caking effect is made worse if the Alcojet does not immediately dispense before running the washer. This causes the wet Alcojet to sit in the wet detergent dispenser cup, cake up solidly and form a cement. When the wash cycle finally pops the dispenser door, the detergent will not dissolve.
Cleaning Guanidine Thiocyanate and Sodium Azide
Q: What do you recommend to clean guanidine thiocyanate and sodium azide from a centrifuge. The centrifuge manufacturer requests a low foaming neutral cleaner. There may also be enzymatic residues.
A: To remove salts like guanidine thiocyanate and sodium azide, and other inorganics, we would normally recommend
How To Dispose of Alnochromix Cleaner
Q: How do you dispose of Alnochromix cleaner and sulfuric acid mixtures? What kind of container can hold the mixture, and what are the outgasses?
A: Excellent question about what disposal and containers are recommend, and what outgasses are there from an Alnochromix®/sulfuric acid solution. The mixture of Alnochromix and concentrated sulfuric acid forms peroxydisulfuric acid, bisulfate salts, and persulfate salts along, which will be present with sulfuric acid. The mixture will outgas sulfur dioxide and oxygen when oxidizing organic residues. This is why you want to store in a vented container. Vent caps are available at Alconox.com in the shop.
Liquinox vs. Citranox
Q: What is the difference between Liquinox vs. Citranox? We are using Liquinox for many of our applications but are having trouble with stainless steel cleaning cannulas with a small ID. Is Citranox the answer if the residue is inorganic?
A: Although Liquinox detergent is excellent at cleaning a host of residues, Citranox cleaner is indeed the better choice if we are fairly certain this is a largely inorganic residue.