1、 实验结果1） 无机氮（1）亚硝酸盐标准曲线浓度吸光度00.010.020.030.040.0510.0140.0510.0780.0970.1300.15120.0120.0510.0730.0980.1230.14630.0140.0520.0880.0980.1300.147平均0.0130.0510.0800.0980.1280.148标准差0.0010.0010.0080.0010.0040.003水样站1（1）站1（2）站2（1）站2（2）站3（1）站3（2）站4（1）站4（2）站5（1）站5（2）10.0240.0330.0470.0430.0150.0130.0300.0040.0140.01320.0270.0350.0470.0430.0150.0140.0300.0040.0140.01630.0310.0380.0450.0470.0160.0160.0300.0040.0140.020站点站 1站 2站 3站 4站 5平均吸光度0.0310.0450.0150.0170.015亚硝酸盐浓度0.0040.0090．0020.0010．002（2）硝酸盐标准曲线（3）氨氮标准曲线浓度00.030.060.090.120.15海水A10.0140.1260.1630.2290.3280.3530.32A20.0130.1270.1630.2330.3270.3530.339A30.0150.1260.1620.2260.3290.3540.326平均值Ai0.0140.1260.1630.2290.3280.3530.328Ai-A000.1120.1490.2150.3140.3390.314标准差0±0.0010.112±0.000580.149±0.000580.215±0.1130.314±0.0010.339±0.000580.314±0.00971水样站点站 1站 2站 3站 4站 510.1840.0910.1030.9570.19720.0950.1020.1100.9590.199平均0.1400.0970.1070.9580.198标准差0.0630.0080.0050.0010.001氨氮浓度0.0190．0050.0060.0080.0082） 无机磷标准曲线浓度吸光度00.030.060.180.24A11.9061.9151.9271.961.982A21.911.9181.9261.9651.986A31.9111.9171.9301.9631.985Ai（平均）1.9091.9171.9281.9631.984Ai-A000.0080.0190.0540.075标准差0±0.0030.008±0.0030.019±0.0040.054±0.0030.075±0.002水样站点站 1站 2站 3站 4站 510.0190.0330.0610.0860.020.0170.0270.0270.0320.02920.0190.0330.0640.0860.0180.0190.0290.0260.0320.02730.0170.0330.0620.0860.0180.0190.0290.0280.0330.029平均0.0260.0740.0190.0280.030无机磷浓度0.0850.2400.0620.0910.1003） 溶解氧4） 化学需氧量硫代硫酸钠标定：第一次：14.41ml第二次：14.36ml平均值：14.385ml硫代硫酸钠浓度为C Na2S2O3= 6*（ C K2Cr2O7 · V K2Cr2O7）/ V Na2S2O3 =6*（0.002*0.01）/0.014385 =0.00834mol/L水样站点站 1站 2站 3站 4站 5空白19.518.606.916.943.8511.0028.308.597.017.514.0511.04平均滴定体积8.9058.5956.9607.2253.95011.020各化学需氧量1.4111281.617962.7088322.5320254.717104站点站 1站 1站 2站 2站 3站 3站 4站 4站 5站 5碘量瓶体积（ml）128113.5119.1113.5132130130125125.5129滴定消耗 Na2S2O3 溶液体积（ml）12.2112.5619.6217.6415.9615.9812.5212.3114.0914.19溶解氧（O2mg/L）6.477.5211.1810.568.198.336.536.687.617.45平均 D (O2mg/L)6.9910.878.266.607.53
