海洋科学2024，Vol.48Issue(12)：102-109,8.DOI:10.11759/hykx20240616001
近海沉积物中有机碳和总氮分析的前处理方法比较研究
Comparative study on pretreatment methods for total-organic-carbon and total-nitrogen analysis of coastal sediments
摘要
Abstract
Marginal seas,crucial connections between land and ocean,serve as significant reservoirs for land-ocean sedimentary organic carbon(SOC).Studying pretreatment methods for analyzing SOC in coastal seas will offer technical support for accurately assessing China's marine carbon storage.Herein,standard sediment samples from Chinese coastal areas were selected for analysis.Through conditional experiments,the effects of different pre-treatment methods,such as rinsing and fumigation,on the removal of inorganic carbon(IC)and the determination of total organic carbon(TOC)in sediments were investigated.Results showed that although rinsing,a commonly used method in China,has advantages in IC removal,it has shortcomings,such as an incorrect theoretical calcula-tion basis,multiple operational steps,time-consuming and labor-intensive procedures,inherent error generation,and significant operator influence.Meanwhile,silver capsule fumigation requires less sample weighing before pre-treatment;moreover,after fumigation in hydrochloric acid vapor for a certain period,the involved samples can be dried and analyzed for TOC analysis,resulting in a relatively simple overall operation.However,for sediment sam-ples with different carbonate contents,the duration of fumigation may affect the efficiency of IC removal,necessi-tating optimization of fumigation time for sediment samples with varying carbonate contents.关键词
近海/沉积物/总有机碳/水洗法/熏蒸法Key words
coastal sea/sediment/total organic carbon/rinsing method/fumigation method分类
海洋科学引用本文复制引用
王金鹏,赵彬,姚鹏..近海沉积物中有机碳和总氮分析的前处理方法比较研究[J].海洋科学,2024,48(12):102-109,8.基金项目
国家重点研发计划(2024YFF1306803) （2024YFF1306803）
广东省自然科学基金资助项目(2019A1515012123) （2019A1515012123）
广州市科技计划项目(2023A04J0255)和中央级公益性科研院所基本科研业务专项(PM-zx703-202305-213,PM-zx703-202406-178,PM-zx703-202406-176)National Key R&D Program of China,No.2024YFF1306803 （2023A04J0255）
The Natural Science Foundation of Guangdong Province,No.2019A1515012123 （）
Science and Technology Program of Guangzhou,No.2023A04J0255 （）
Central Research Institutes of Basic Research Program,China,Nos.PM-zx703-202305-213,PM-zx703-202406-178,PM-zx703-202406-176 （）
