測定水中低濃度溶解性有機氮濃度的方法PROCESS FOR MEASUREMENTS OF CONCENTRATION OF DISSOLVED ORGANIC NITROGEN (DON) WITH LOW CONCENTRATION IN WATER

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

099126923

專利證號

I 409448

專利獲證名稱

測定水中低濃度溶解性有機氮濃度的方法PROCESS FOR MEASUREMENTS OF CONCENTRATION OF DISSOLVED ORGANIC NITROGEN (DON) WITH LOW CONCENTRATION IN WATER

專利所屬機關 (申請機關)

國立高雄第一科技大學

獲證日期

2013/09/21

技術說明

本發明係有關於一種測定水中低濃度溶解性有機氮(DON)的方法，利用奈米薄膜分離技術來提昇溶解性有機氮濃度量測的準確度。在預處理之前的準備過程中，水樣用孔徑大於等於0.22 µｍ而小於等於0.45 µｍ的微濾膜過濾除去顆粒性雜質，取過濾後的水樣調節其pH值範圍於6.0-9.0，以截留分子量為150-500道耳吞(Dalton)的選擇性奈米薄膜，利用垂直(dead-e過濾或掃流(cross-flow)過濾方式，將水樣中的DON濃縮6-15倍；最後水樣中的DON含量，可由總氮減去其他測定之無機氮含量總和(包含硝酸鹽氮、亞硝酸鹽氮和氨氮)後，除以實際濃縮倍數而獲得；藉此，提高了DON測試的準確度和精確度，解決了直接水樣測定法中DON經常出現負值、濃度標準偏差大等問題；且整個測定過程簡單有效、易於操作、成本低，可廣泛應用於地表和地下水監測，以及大、中和小型淨水場與污水廠的監測與分析。 Dissolved organic nitrogen (DON) measurements for water samples with a high dissolved inorganic nitrogen (DIN, including nitrite, nitrate and ammonia) to total dissolved nitrogen (TDN) ratio using traditional methods are inaccurate due to the cumulative analytical errors of independently measured nitrogen species (TDN and DIN). In this study, we present a nanofiltration (NF) pretreatment to increase the accuracy and precision of DON measurements by selectively concentrating DON while passing through DIN species in water samples to reduce the DIN/TDN ratio. Compared to the available dialysis pretreatment method, the NF pretreatment method shows a similar improved performance for DON measurement for aqueous samples and can save at least 20 hours of operating time and a large volume of deionized water, which is beneficial for laboratories involved in DON analysis.

備註

本部(發文號1080031579)同意貴校108年5月22日高科大研字第1082800318號函申請終止維護專利。

連絡單位 (專責單位/部門名稱)

研究發展處

連絡電話

6011000

網址