Loss on ignition and caesium-137 in sediments from the Hanko submarine groundwater discharge site, northern Baltic Sea, Finland

Sediment samples were collected using a box corer, and cut in 1-cm sub-sample slices. The Cs-137 activity content of sub-samples was measured for 60 min using a BrightSpec bMCA-USB pulse height analyser coupled to a well-type NaI(Tl) detector. The same sub-samples were then analysed for water content and weight loss on ignition (LOI) by weighing sub-samples fresh, weighing after drying at 105 °C for 16 h, and weighing again after ignition at 550 °C for 2 h.