海水养殖尾水总氮的测定方法优化与应用研究

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中图分类号：0657.3 文献标志码：A 文章编号：2095-2945（2025）34-0057-04

Abstract：Thisstudyoptimizedthedeterminationmethodoftotalnitrogen（TN）inmarineaquaculturetail waterand proposedanonlinemonitoringmethodbasedonhigh-temperaturedigestionofalkalinepotassiumpersulfateandreductionof vanadiumtrichloride.Theaccuracy，precision，andenvironmentalfriendlinessofthemethodwereverifiedbycomparingitwith thenationalstandardmethodGB/T17378.4—2007"MarineMonitoring SpecificationPart4：SeawaterAnalysis".Experimental results show that the method has high sensitivity（detection limit is 0.055mg/I ），goodreproducibility（RSDis 2.23% ）and high spike recovery （90.86%～107.44 % ）.In addition，salinity has litle impact on the measurement results and is suitable for continuous monitoringoftotalnitrogeninmarineaquaculturetailwater.Thisstudyprovidestechnicalsupportfortherapiddetectionand scientific management of marine aquaculture tail water.

Keywords：marineaquaculturetailwater;totalnitrogen;vanadiumchlorideduction;onlinemonitoring;environmentallfriendly

我国是世界海水养殖大国之一，养殖面积以及产量占世界的 60% 以上，然而，养殖过程中产生的尾水中含有高浓度的氮、磷等污染物，直接或间接排放到邻近海域，对海洋生态环境造成了严重威胁。（剩余4619字）