Application of an Ion‐Selective Electrode Method to the Determination of Chloride in 41 International Geochemical Reference Materials

Determinations of trace amounts (with one exception) of chloride are reported for 41 international geochemical reference standards, 12 of which have no previously reported literature values. All determinations were made by the chloride-specific ion-selective electrode method of Aruscavage and Campbell with certain refinements. Chlorine is separated from most other elements in geologic materials by acid-dissolution in a gas diffusion cell, and is subsequently determined as the chloride ion in basic solution. A statistical F-test was applied to 19 of the standards for which three bottles of each were analyzed in triplicate with no failures. All these standards, plus the other 22 for which six analyses were performed on a single bottle, exhibited a relative standard deviation of 1-6% for concentrations of chloride >50 ppm. For most samples chloride values agree well both with available, reported experimental values and with recommended or consensus values.

[1]  I. Roelandts,et al.  1982 Compilation of Elemental Concentrations in Eleven United States Geological Survey Rock Standards , 1983 .

[2]  F. J. Flanagan.  1972 values for international geochemical reference samples , 1973 .

[3]  W. Zoller,et al.  Neutron‐Capture Prompt Gamma‐Ray Multielement Analysis of Twenty‐Two Geochemical Reference Standards , 1985 .

[4]  P. Aruscavage,et al.  An ion-selective electrode method for determination of chlorine in geological materials. , 1983, Talanta.

[5]  L. Leoni,et al.  Determination of S, Cl and F in silicate rocks by X‐ray fluorescence analyses , 1982 .

[6]  R. Fuge.  Determination of Fluorine and Chlorine in Eight USGS Reference Samples Using Automated Photometric Analysis , 1981 .

[7]  R. Fuge.  Chlorine in 27 Geochemical Reference Samples , 1985 .

[8]  C. Gent,et al.  The Determination of Sulfur and Chlorine in Coals and Oil Shales Using Ion Chromatography , 1985 .

[9]  K. Govindaraju.  Report (1980) on Three GIT‐IWG Rock Reference Samples: Anorthosite from Greenland, AN‐G; Basalte d'Essey‐la‐Côte, BE‐N; Granite de Beauvoir, MA‐N , 1980 .

[10]  K. Govindaraju.  1984 Compilation of Working Values and Sample Description for 170 International Reference Samples Of Mainly Silicate Rocks and Minerals , 1984 .

[11]  C. Gent,et al.  Determination of chloride in geological samples by ion chromatography , 1983 .

[12]  W. H. Huang,et al.  The chlorine and fluorine contents of geochemical standards , 1967 .

[13]  W. B. Stern.  Le Dosage du Chlore dans Quelques Géostandards Silicatés , 1977 .

[14]  C. Moore,et al.  Pyrohydrolytic-ion chromatographic determination of fluorine, chlorine, and sulfur in geological samples , 1981 .

[15]  G. Troll,et al.  Determination of Fluorine, Chlorine and Water in Eight USGS Reference Samples , 1980 .

[16]  C. Moore,et al.  Combustion-ion chromatographic determination of chlorine in silicate rocks , 1980 .

[17]  E. Gladney,et al.  Elemental Concentrations in Eight New United States Geological Survey Rock Standards: A Review* , 1981 .

[18]  E. Steinnes,et al.  Determination of chlorine in U.S.G.S. standard rocks by neutron activation analysis , 1967 .

[19]  H. Kawamoto,et al.  Determination of chlorine in silicate rocks by ion-exchange chromatography and direct potentiometry with an ion-selective electrode. , 1979, Talanta.

[20]  C. Unni,et al.  Determination of chlorine in silicate rocks by neutron activation analysis , 1978 .

[21]  A. Clark,et al.  A rapid method for the determination of chlorine in silicate rocks using ion-selective electrodes , 1972 .

[22]  E. Steinnes,et al.  Phosphorus and ChlorinE Content of Eight New U.S.G.S. Standard Rocks , 1979 .

[23]  B. P. Fabbi,et al.  X-Ray Fluorescence Determination of Chlorine in Standard Silicate Rocks , 1972 .

[24]  P. Trujillo,et al.  Elemental Concentrations in Japanese Silicate Rock Standards JA‐1, JR‐1 and JB‐2 , 1985 .

[25]  J. R. Vogt,et al.  Determination of elements in National Bureau of Standards' geological standard reference materials by neutron activation analysis , 1982 .