In:
Water Resources Research, American Geophysical Union (AGU), Vol. 35, No. 1 ( 1999-01), p. 329-334
Abstract:
Precision and accuracy are reported for the first time for the analysis of nonpurgeable suspended organic carbon by silver membrane filtration followed by wet chemical oxidation. A water sample is pressure filtered through a 0.45‐μm‐pore‐size, 47‐mm‐diameter silver membrane filter. The silver membrane filter then is cut into ribbons and placed in a flame‐sealable glass ampule. The organic material trapped on the membrane filter strips is acidified, purged with oxygen to remove inorganic carbonates and volatile organic compounds, and oxidized to carbon dioxide (CO 2 ) using phosphoric acid and potassium persulfate in the sealed glass ampule. The resulting CO 2 is measured by a nondispersive infrared CO 2 detector. The amount of CO 2 is proportional to the concentration of chemically oxidizable nonpurgeable organic carbon in the environmental water sample. The quantitation and method detection limit for routine analysis is 0.2 mg/L. The average percent recovery in five representative matrices was 97 ± 11%. The errors associated with sampling and sample preparation of nonpurgeable suspended organic carbon are also described.
Type of Medium:
Online Resource
ISSN:
0043-1397
,
1944-7973
DOI:
10.1029/1998WR900052
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
1999
detail.hit.zdb_id:
2029553-4
detail.hit.zdb_id:
5564-5
SSG:
13
SSG:
14
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