Active Standard ASTM D4137 | Developed by Subcommittee: D19.24
Book of Standards Volume: 11.06
Historical (view previous versions of standard)
Significance and Use
4.1 Formaldehyde solution can be used as a permanent preservative of algae. Lugol's solution can be used to preserve algae for up to one year. Lugol's is a more suitable preservative for delicate algae such as naked flagellates.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
ICS Number Code 07.100.20 (Microbiology of water)