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水質(zhì)氨氮的分光光度法測(cè)定及不確定度評(píng)定

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摘 要:以水樣中氨氮為研究對(duì)象,采用納氏試劑分光光度法,通過(guò)測(cè)定重復(fù)性、標(biāo)準(zhǔn)溶液配制和標(biāo)準(zhǔn)曲線擬合等分量,對(duì)水樣中的氨氮含量測(cè)定時(shí)影響分析結(jié)果的不確定度因素進(jìn)行評(píng)定,結(jié)果表明,所測(cè)水樣中氨氮含量為(13.2±0.26) mg/L,標(biāo)準(zhǔn)曲線擬合引起的不確定度為影響不確定度的主要因素。

關(guān)鍵詞:氨氮;不確定度;分光光度法

中圖分類號(hào):X832      文獻(xiàn)標(biāo)志碼:A     文章編號(hào):1003-5168(2022)18-0085-04

DOI:10.19968/j.cnki.hnkj.1003-5168.2022.18.017

Uncertainty Evaluation for Determination of Ammonia Nitrogen in

Water by Spectrophotometry

CHEN Yihu1    ZHOU Wei2

(1.Suzhou Vocational University,Suzhou  215000,China;2. Suzhou Baixin Environmental Testing Engineering Technology Co., Ltd.,Suzhou  215000,China)

Abstract: The study adopts Nessler's reagent spectrophotometric method to determinate the ammonia nitrogen content in water, and make evaluation of uncertainty through several factors such as measurement repeatability 、standard solution and calibration curve fitting that affect the determination result. The results show that the ammonia nitrogen content in water is(13.2±0.26) mg/L, calibration curve fitting is a major influence of uncertainty of determination of ammonia nitrogen..

Keywords: ammonia nitrogen;uncertainty;spectrophotometry

0 引言

1927年,德國(guó)物理學(xué)家海森伯格(W.Heisenberg)在分析理想試驗(yàn)的基礎(chǔ)上首先提出了不確定原理,認(rèn)為人類觀測(cè)事物的精準(zhǔn)程度是有限的,不確定原理是量子力學(xué)的基本原理之一。(剩余4172字)

目錄
monitor