2.2.1. Reagents
Calibration solutions were prepared by dilution of 1 g L−1
Cu or Mn in 0.5MHNO3 Merck standard. Hydrofluoric acid
40% (22.5 M) was suprapur grade (Merck). Ultrapure water
from a Millipore mro-MQ system was used. The spiked
seawater sample was a North Atlantic seawater sample, collected
near Brest. Ten grams per liter Pd(NO3)2 in ∼15%
HNO3 was a Merck product.