论文信息 - Ion chromatographic determination of common ions at ultratrace levels in antarctic snow and ice

Ion chromatographic determination of common ions at ultratrace levels in antarctic snow and ice

Abstract The simultaneous determination of major impurities present in Antarctic snow and ice at ng g − (ppb) concentrations by ion chromatography is described. Calibration data are presented for ammonium, sodium, potassium, chloride, nitrate and sulphate ions. Special attention is paid to the different ways of removing field contamination from ice and snow cores and suitable equipment is described. The results provide evidence against the validity of published sets of concentration data for nitrogen-containing compounds (NO − 3 and NH + 4 in Antarctic snow, and demonstrate a crucial contamination problem in the determination of ammonium ions.

[1] C. Boutron,et al. Preconcentration of dilute solutions at the 10-12g/g level by nonboiling evaporation with variable variance calibration curves , 1979 .

[2] M. Herron. Impurity sources Of F−, Cl−, NO3 − and SO4 2− in Greenland and Antarctic precipitation , 1982 .

[3] M. Legrand,et al. Acid titration of polar snow , 1982 .

[4] B. Parker,et al. Nitrate ion in Antarctic firn as a marker for solar activity , 1981 .

[5] H. Schleicher,et al. Determination of trace level ions by ion chromatography with concentrator columns , 1979 .

[6] K. Snetsinger,et al. Reactivity of stratospheric aerosols to small amounts of ammonia in the laboratory environment , 1980 .

[7] C. Boutron,et al. The occurrence of lead in Antarctic recent snow, firn deposited over the last two centuries and prehistoric ice , 1983 .

[8] W. Zoller,et al. The chemical composition of remote area aerosols , 1981 .