Riboflavin coverage 2

[chemqo]

Does anyone know the industry standard for the riboflavin concentration used for coverage testing? Also, how do you prepare the mixture such that the riboflavin is fully dissolved?

 

[rfitts]

Check out this reference document...

http://www.vdma.org/wps/wcm/resourc...Information_Sheet_Riboflavintest_Dec_2007.pdf

Please share any riboflavin test information that you have?
Bob

 

[chemqo]

The only thing missing is reference to the cleaning solution that is proposed for use. My understanding from other literature that I've read is that the success or failure of removing the riboflavin is judged using the cleaning cycle AND cleaning chemicals...not the cleaning cycle AND water only. Thoughts??

 

[Marke525]

The most commonly used concentration is 0.2g/l.

In regard to water versus chemical cleaning it is an area of contention.

You can remove the ribo, wet or dry, with water only. However, when the ribo is allowed to dry the amount of water needed to remove it is far greater.
In a Factory Acceptance Test (FAT) at a vessel fabrication facility they generally only have water available and would prefer to do a wet ribo test. The end-user generally wants to see dried ribo because this is seen as more thorough.