SAMPLE PREPARATION:
NOTE: Silver halides are photosensitive. Protect from light during transfer and desorption.
5. Under very dim or red light, open cassette and transfer the silver filter with forceps to amber
bottle. Add 3 mL 6 m M Na2S2O3 and cap.
NOTE: Prefilter may be analyzed for particulate halides, or discarded.
6. Allow samples to stand a minimum of 10 min with occasional swirling.
NOTE: Once desorbed, samples are no longer photosensitive.
7. Uncap the sample bottles and add 7 mL deionized water for a total solution volume of 1