TOTAL DISSOLVED NITROGEN IN THE NORTHERN NORTH PACIFIC ASSESSED BY A HIGH-TEMPERATURE COMBUSTION METHOD

被引：25

作者：

KOIKE, I

TUPAS, L

机构：

[1] Ocean Research Institute, University of Tokyo, Nakano, Tokyo

来源：

MARINE CHEMISTRY | 1993年 / 41卷 / 1-3期

关键词：

D O I：

10.1016/0304-4203(93)90121-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dissolved organic nitrogen (DON) concentrations in the Northern North Pacific were examined by a high-temperature combustion method using a commercially available instrument (the Yanaco TN-7). Recovery of standard compounds and purified humic acids from freshwater and coastal sediments was greater than 90% except for one humic acid sample. Vertical profiles of DON concentration in the eastern portion of the Northern North Pacific showed no large variations, although the concentration in the upper 100 m (10-12 mug atoms Nl-1) was significantly higher than in the middle and deep layers (6-8 mug atoms Nl-1). DON analysis of samples from a similar region using a Sumigraph N-200 gave rather low concentrations compared with those obtained using the Yanaco TN-7, i.e. approximately 4-5 mug atoms Nl-1 in the upper 0-100 m and 2.0-2.6 mug atoms Nl-1 in middle and deep layers.

引用

页码：209 / 214

页数：6

共 9 条

[1]

HATTORI A, 1986, KH863 U TOK OC RES I

[2]

HATTORI A, 1986, KH833 U TOK OC RES I

[3]

HATTORI A, 1986, KH852 U TOK OC RES I

[4] VERTICAL-DISTRIBUTION OF TOTAL DISSOLVED NITROGEN AND DISSOLVED ORGANIC NITROGEN IN SEAWATER [J].