Can the Dissolved Iron Chemkey® Reagents be used with digested samples?
Dissolved Iron Chemkey® with digested samples
The Dissolved Iron Chemkey® Reagents (box of 25) Product # 8636000 follow the Iron, Dissolved, 1,10-Phenanthroline Method 10281 which only mentions dissolved iron. Given the similarities in chemistry between the powder pillow and the Chemkey® customers could use digested samples if the sample pH is adjusted to within 3 - 5 pH with NaOH after digestion related to method Iron,Total FerroVer® Method 8008. It should be made apparent that digested samples have not been tested as a part of development for this Chemkey® and any turbidity that is left over greater than 20NTU and particles larger than 1 mm could affect results.