Not only is it fine, but it's the most common (and i would say most correct) way to write scientific papers.

The tone of scientific papers is usually supposed to focus on the science, not the scientist, so you have "reagent A was mixed with reagent B", not "I mixed reagent A and reagent B".

An added bonus is that it prevents having to assign credit to each and every step of a procedure, which would be distracting. E.G., "Alice added 200 ml water to the flask while Bob weighed out 5 g of sodium hydroxide and added it to the flask".

Who says it's not?
(/s)