Exercise 85. Metallic Manganese

When a 350 ml seawater sample was spiked with 54Mn and taken through the chelation, extraction, and back-extraction procedures, the observed recovery of the radio-tracer was 100.6%. Estimates of detection limits for manganese based on sets of both shipboard and shore laboratory separations are of the order of 0.1 nmol/1. The accuracy of the technique is demonstrated by data from the ICES fifth-round intercalibration exercise for trace metals in seawater [449 ]. 

An observational exercise using compounds of chromium, manganese, cobalt, nickel and copper will emphasise that these metals have coloured compounds. 

EXERCISE 6.8 Manganese metal can be obtained by reaction of manganese dioxide with aluminum. 

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