Estimation of dissolved organic carbon (DOC) concentrations in nanoliter samples using UV spectroscopy

被引：61

作者：

Deflandre, B ^{[1
]}

Gagné, JP ^{[1
]}

机构：

[1] Univ Quebec, Inst Sci Mer Rimouski, Rimouski, PQ G5L 3A1, Canada

来源：

WATER RESEARCH | 2001年 / 35卷 / 13期

关键词：

dissolved organic carbon (DOC); microsample; microanalysis; microenvironments; porewater;

D O I：

10.1016/S0043-1354(01)00024-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A simple analytical system has been developed and tested for estimating dissolved organic carbon (DOC) concentrations in nanoliter samples of sediment porewaters. The system consists of a loop injector that introduces 200 nL of sample directly into the capillary tubing connected to a scanning UV-VIS detector equipped with a 35-nanoliter capillary flowcell. Analysis of DOC by spectroscopic and high-temperature catalytic oxidation (HTCO) methods on the same samples showed a strong linear correlation between UV absorbance at 254 nm and HTCO-DOC concentration, allowing the DOC quantification. The simplicity and the robustness of the UV system allow DOC measurements in the field at a rate of 30samples/h. We have used the UV system successfully for determining high-resolution distributions of porewater DOC concentrations in sediments at millimeter scales. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：3057 / 3062

页数：6

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