preconcentration of cs in seawater

Ammonium molybdo phosphate (AMP)

Copper ferrocyanate (Cu Fe(CN)6) 1 Ammonium molybdo phosphate (AMP)

AMP(Cs) suspension from sea watersettling, siphoning/decantingof supernatant solution,centrifuging AMP(Cs)AMP(Cs) precipitate (1st)+ 10M NaOH to dissolve AMP(Cs)centrifuge/filter insoluble residueCs+, NH3, (MoO3)12PO43- solution in NaOHheat, boil out NH3dilute to 500 mlacidify to pH = 2 with conc HCladd 1g fresh AMPAMP(Cs) precipitate (2nd) settling, decanting, centrifuging+10M NaOH to dissolve AMP(Cs)adjust volume to standard geometry134Cs, 137Cs solution for gamma spectrometry

Cartridge preparation:

cartridges used in cotton with a stainless steel core.(Cuno Mycrowynd C-CCTY 1m cotton media, stainless steel core 316).2 Pre-concentration of caesium using CuFeCN6 cartridges.

Use of cartridge:

a) With 134Cs tracer:

b) Without 134Cs tracer:Note the salinity and the temperature.Filter the water through a 1m polypropylene cartridge.Use a flow meter to check the volume and the flow rate.Use two Cu Fe(CN)6 cartridges.