五参数全自动营养盐分析仪的研制与应用

本文研制了一种用来检测海水中营养盐含量的五参数全自劝分析仪.应用该仪器对海水中的正确酸盐、氨氮、可溶性硅酸盐、硝酸盐和亚硝酸盐含量进行了测定.其中正磷酸盐的线性范围,检出限和相对标准偏差分别为10-400 μg/L(r0.9997),0.7 μg/L和0.4%;可溶性硅酸盐的线性范围,检出限和相对标准偏差分别为50-2...

Development and Application of Five Parameters Automatic Seawater Nutrients Analyzer

A five-parameters automatic seawater nutrients analyzer was s developed to determine nutrients in sea water.The analyzer was used to determine orthophosphate,dissolved silicate,ammonia,nitrate and nitrite were studied.The linearity,the detection limit and the relative standard deviation of the orthophosphate were found to be 10-400μg/L（r 0.9997）,0.7μg/L and 0.4%,respectively.The linearity,the detection limit and the relative standard deviation of the dissolved silicate were found to be 50-2000μg/L（r 0.9999）,1.3μg/L and 1.6%,respectively.The linearity,the detection limit and the relative standard deviation of the ammonia were found to be 20-2000μg/L（r 0.9999）,2.5μg/L and 2.5%,respectively.The linearity,the detection limit and the relative standard deviation of the nitrate were found to be 20-1000μg/L（r 0.9997）,0.4μg/L and 0.2%,respectively.The linearity,the detection limit and the relative standard deviation of the nitrite were found to be 10-500μg/L（r 0.9999）,0.3μg/L and 0.1%,respectively.Two seawater samples were analyzed with recoveries ranging from 91.8% to 102.1%.Using the paired Student＇s t-test at the 95% confidence level,the results of the analyzer and reference method for determination of the three samples showed no significant difference.