Accurately quantification of 29N2 concentration in 15N tracer derived marine denitrificaiton rates

Zeng Jian; Chen Min; Zheng Minfang; Qiu Yusheng

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Zeng Jian, Chen Min, Zheng Minfang, Qiu Yusheng. Accurately quantification of 29N2 concentration in 15N tracer derived marine denitrificaiton rates[J]. Haiyang Xuebao, 2014, 36(6): 10-17.

Citation:

Zeng Jian, Chen Min, Zheng Minfang, Qiu Yusheng. Accurately quantification of ²⁹N₂ concentration in ¹⁵N tracer derived marine denitrificaiton rates[J]. Haiyang Xuebao, 2014, 36(6): 10-17.

Zeng Jian, Chen Min, Zheng Minfang, Qiu Yusheng. Accurately quantification of 29N2 concentration in 15N tracer derived marine denitrificaiton rates[J]. Haiyang Xuebao, 2014, 36(6): 10-17.

Citation:

Zeng Jian, Chen Min, Zheng Minfang, Qiu Yusheng. Accurately quantification of ²⁹N₂ concentration in ¹⁵N tracer derived marine denitrificaiton rates[J]. Haiyang Xuebao, 2014, 36(6): 10-17.

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Accurately quantification of ²⁹N₂ concentration in ¹⁵N tracer derived marine denitrificaiton rates

1.
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
2.
College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environment Science, Xiamen University, Xiamen 361005, China

Received Date: 2013-06-25

Abstract

Abstract

¹⁵N tracer technique was widely applicated in measuring water column denitrification rate in water samples,however,the sealed samples could be contaminated by air during a long time storage. Our study suggested that N₂ in air has a constant ²⁹N₂/²⁸N₂ ratio of 0.007 35. According to this feature,a mass-balance calculation was proposed to calibrate the interference from air background. It helps obtain more accurately ²⁹N₂ concentrations produced by biological activity and further the denitrification rates. After the calibration,the deviations of ²⁹N₂ concentrations were much less than those of the raw data,and the linear correlation between ²⁹N₂ concentration and the incubation time was more significant. It is important to calibrate extra ²⁹N₂ signals from air contamination for accurately quantification of denitrification rate,considering the ¹⁵N technique has been widely used in pelagic and beneath denitrification rate measurements.
- ¹⁵N tracer,
- denitrification rate,
- air contamination,
- ²⁹N₂ calibration

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References(43)

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