Affordable Access

Publisher Website

Aluminium measured on non-toxic water pump samples DI184_TLS67

Publication Date
DOI: 10.1594/pangaea.197170
  • Aluminium
  • Biogeochemical Ocean Flux Study
  • Bofs
  • D184
  • Di184_Tls67
  • Discovery (1962)
  • Jgofs
  • Joint Global Ocean Flux Study
  • Ships Non-Toxic Pump
  • Tls67


Aluminium Introduction This document covers the surface underway aluminium data and aluminium depth profiles collected during Discovery 184 and presented in the file AL. The methodology has been taken from Lunel (1990). Sample Acquisition Surface samples were taken from the ship’s non-toxic surface sea water supply. Initial monitoring of the water showed contamination to be negligible whilst the ship was moving. The depth profiles were collected using trace-metal clean, teflon-lined Go-Flo bottles. Problems with leakage encountered on previous cruises were overcome by frequent servicing of the ball valves. All water samples were drawn into acid-cleaned polyethylene bottles. Analysis Samples were analysed on board within an hour of collection using the Lumogallion method of Hydes and Liss (1976). The method was modified slightly, using quartz-distilled buffer, to reduce reagent blanks and enhance the reproducibility of the data. The water samples were not filtered prior to analysis to minimise delays and to remove the risk of contamination during filtration. Thus the data are not truly ’dissolved Al’ which normally infers filtration through a 0.45 micron filter. However, Hydes and Liss (1976) showed that the method does not react with particulate aluminium to a significant extent because the reaction conditions are relatively mild (pH 5). Interference from colloidal aluminium, which would be expected to react with the Lumogallion, is believed to be a relatively minor problem because it has been reported (Moran and Moore 1989) as a minor (10-15% of measured 0.45 micron filtered value) constituent of North Atlantic water. References Hydes, D.J. and Liss, P.S. (1976). Fluorometric method for the determination of low concentrations of dissolved aluminium in natural waters. Analyst 101: 922-931. Lunel, T. (1990). Trace metal concentrations and isotopes as tracers of oceanic processes. Unpublished Ph.D.. Cambridge University. Moran, S.B. and Moore, R.M. (1989). The distribution

There are no comments yet on this publication. Be the first to share your thoughts.