《工业生产中氨水浓度如何测定.docx》由会员分享，可在线阅读，更多相关《工业生产中氨水浓度如何测定.docx（38页珍藏版）》请在课桌文档上搜索。
1、工业生产中氨水浓度如何测定氨水在工业中应用非常广泛，在使用的过程中，很多场合需要对氨水的浓度进行控制，浓度的测量就非常的关键。在流程工业中，氨水浓度的测定一般有两种方式，一是取样检测，二是在线检测。取样检测的方式数据获取滞后，适用于一些间歇操作或对氨水浓度精确度要求较低的工艺过程。取样检测的方式有两种分析方法：方法一：化学滴定法该方法适用于浓度在30%以下的氨水浓度测定。氨水在水中部分氨分子与水发生解离，形成氢氧根离子和镂根离子。溶液呈碱性，化学滴定法以甲基红为指示剂，用标准硫酸溶液滴定至红色为中点，根据所用标准硫酸溶液的用量计算氨水浓度。所用的试剂：硫酸标准滴定溶液（c（l2H2SO4）=0
2、.5mol1.或c（l2H2SO4）=1.0mol1.）甲基红指示剂lg/1.分析步骤：（1）吸取适量试样（试氨含量高低而定）注入预先盛有50ml蒸储水的25Oml锥形瓶中，加3滴甲基红指示剂，用1.0mol1.或0.5mol1.硫酸标准滴定溶液滴至出现红色为终点，记下所消耗体积。（2）测定样品密度。结果计算：NH3(%)X100%Cleri17.03KJ1000其中：Cl一硫酸标准滴定溶液浓度，mol/1.Vl一硫酸标准滴定溶液消耗体积，mlV取样体积，mld样品密度，g/ml17.03氨的摩尔质量，g/mol注：（1）取样后应立即分析，以免样品挥发使结果偏低。（2）此样品分析操作时应在通风
3、橱内进行。（3）滴定时应快滴慢摇方法二：密度计法此方法为快速测定法，通过测定样品的密度，查表得出氨水的浓度。密度浓度数据对比见附件。在线检测方式用于自动控制的工艺过程，能够实时反应氨水浓度，滞后小，快捷准确。减少人工劳动强度，在氨水配置、氨水使用过程中广泛应用。该方法基于密度浓度数据对比数据，通过用在线密度计实时监测氨水密度，间接控制氨水浓度。通常采用的密度测量仪表有差压式、质量式、放射式、音叉式。可参考本公众号文章密度测量仪表。氨水密度浓度数据对照表。Excel版，可在公众号后台回复“氨水”获取下载链接。NH3浓度氨水比重%g/1.0.0470.4630.9980.0940.9270.997
4、80.1421.390.9976O.1891.854O.9974O.2362.318O.9972O.2842.785O.997O.3313.245O.9968O.3783.709O.9966O.4254.173O.9964O.4734.636O.9962O.525.1O.996O.5665.56O.99580.6126.02O.9956O.6586.48O.9954O.7046.94O.9952O.757.4O.995O.7967.86O.9948O.8428.32O.9946O.8888.781O.9944O.9349.24O.9942O.989.7O.9941.02510.140.9938
5、1.0710.580.99361.11511.020.99341.1611.450.99321.20511.90.9931.2512.340.99281.29512.780.99261.3413.220.99241.38513.660.99221.4314.10.9921.47614.560.99181.52215.020.99161.56815.480.99141.61415.940.99121.6616.40.9911.70616.840.99081.75217.320.99061.79817.980.99041.84418.240.99021.8918.70.991.93619.150.
6、98981.98219.60.98962.02820.050.98942.07420.50.98922.1220.960.9892.16621.410.98882.21221.860.98862.25822.310.98842.30422.760.98822.3523.210.9882.39723.670.98782.44424.130.98762.49124.590.98742.53825.050.98722.58525.540.9872.65225.970.98682.67926.430.98662.72626.890.98642.77327.350.98622.8227.810.9862
7、.86828.280.98582.91628.740.98562.96429.210.98543.01229.670.98523.0630.140.9853.10830.610.98483.12631.070.98463.20431.540.98443.252320.98423.332.470.9843.34832.930.98383.39633.40.98363.44433.860.98343.49234.330.98323.5434.790.9833.58835.260.98283.63635.720.98263.68436.180.98243.73236.650.98223.7837.1
8、10.9823.82937.580.98183.87838.060.98163.92738.530.98143.97639.010.98124.02539.480.9814.07439.950.98084.12340.430.98064.17240.90.98044.22141.380.98024.2741.850.984.31942.320.97984.36842.790.97964.41743.260.97944.46643.730.97924.51544.20.9794.56444.670.97884.61345.140.97864.66245.610.97844.71146.080.9
9、7824.7646.550.9784.80947.020.97784.85847.490.97764.90747.960.97744.95648.430.97725.00548.90.9775.05449.360.97685.10349.830.97665.15250.30.97645.20150.770.97625.2551.240.9765.351.720.97585.3552.190.97565.452.670.97545.4553.150.97525.553.630.9755.5554.10.97485.654.580.97465.6555.060.97445.755.530.9742
10、5.7556.010.9745.856.480.97385.8556.960.97365.957.430.97345.9557.910.9732658.380.9736.0558.850.97286.159.330.97266.1559.80.97246.260.280.97226.2560.750.9726.361.220.97186.3561.70.97166.462.170.97146.4562.640.97126.563.120.9716.5563.590.97086.664.060.97066.6564.530.97046.765.010.97026.7565.480.976.801
11、65.960.96986.85266.440.96966.90366.910.96946.95467.390.96927.00567.870.9697.05668.350.96887.10768.830.96867.15869.30.96847.20969.780.96827.2670.260.9687.31170.740.96787.36271.220.96767.44371.70.96747.46472.180.96727.51572.660.9677.56673.130.96687.61773.610.96667.66874.090.96647.71974.570.96627.7775.
12、050.9667.82275.540.96587.87476.020.96567.92676.510.96547.97876.990.96528.0377.480.9658.08277.970.96488.13478.450.96468.18678.940.96448.23879.420.96428.2979.910.9648.34380.40.96388.39680.90.96368.44981.390.96348.50281.890.96328.55582.380.9638.60881.870.96288.66183.370.96268.71483.860.96248.76784.360.
13、96228.8284.850.9628.87285.330.96188.92485.810.96168.97686.290.96149.02886.770.96129.0887.260.9619.13287.740.96089.18488.220.96069.23688.70.96049.28889.180.96029.3489.660.969.39390.150.95989.44690.640.95969.44990.650.95949.55291.620.95929.60592.110.9599.65892.590.95889.71193.080.95869.76493.570.95849
14、.81794.060.95829.8794.550.9589.92395.040.95789.97695.520.957610.02996.010.957410.08296.50.957210.12596.990.95710.18897.470.956810.24197.960.956610.29498.450.956410.34798.930.956210.499.420.95610.4699.930.955810.52100.440.955610.58100.940.955410.64101.540.955210.7101.960.95510.76102.470.954810.82102.
15、980.954610.88103.480.954410.94103.99O.954211104.5O.95411.05104.99O.953811.1105.48O.953611.15105.97O.953411.2106.46O.953211.25106.95O.95311.3107.44O.952811.35107.93O.952611.4108.42O.952411.45108.91O.952211.5109.4O.95211.55109.89O.951811.6110.38O.951611.65HO.87O.951411.7111.36O.951211.75111.85O.95111.
16、8112.34O.950811.85112.830.950611.9113.320.950411.95113.810.950212114.30.9512.06114.80.949812.12115.30.949612.18115.80.949412.24116.30.949212.3116.80.94912.36117.30.948812.42117.80.948612.48118.30.948412.54118.80.948212.6119.30.94812.65119.80.947812.7120.30.947612.75120.80.947412.8121.30.947212.85121
17、.80.94712.9122.30.946812.95122.80.946613123.30.946413.05123.80.946213.1124.30.94613.16124.80.945813.22125.30.945613.28125.80.945413.34126.30.945213.4126.80.94513.46127.30.944813.52127.80.944613.58128.30.944413.64128.80.944213.7129.30.94413.74129.830.943813.82130.360.943613.88130.890.943413.94131.420
18、.943214131.950.94314.06132.480.942814.12133.010.942614.18133.540.942414.24134.070.942214.3134.60.94214.36135.130.941814.42135.660.941614.48136.190.941414.54136.720.941214.6137.250.94114.66137.780.940814.72138.310.940614.78138.840.940414.84139.370.940214.9139.90.9414.96140.420.939815.02140.940.939615
19、.08141.460.939415.14141.980.939215.2142.50.93915.26143.020.938815.32143.540.938615.38144.060.938415.44144.580.938215.5145.10.93815.56145.620.937815.62146.140.937615.68146.660.937415.74147.180.937215.8147.70.93715.86148.220.936815.92148.740.936615.98149.260.936416.04149.780.936216.1150.30.93616.16150
20、.820.935816.22151.340.935616.28151.860.935416.34152.380.935216.4152.90.93516.46153.420.934816.52153.940.934616.58154.460.934416.64154.980.934216.7155.50.93416.76156.020.933816.82156.540.933616.88157.060.933416.94157.580.933217158.10.93317.06158.620.932817.12159.140.932617.18159.660.932417.24160.180.
21、932217.3160.70.93217.36161.230.931817.42161.760.931617.48162.290.931417.54162.820.931217.6163.350.93117.66163.880.930817.72164.410.930617.78164.940.930417.84165.470.930217.91660.9317.96166.510.929818.02167.020.929618.08167.530.929418.14168.040.929218.2168.550.92918.26169.060.928818.32169.570.928618.
22、38170.080.928418.44170.590.928218.5171.10.92818.56171.640.927818.62172.180.927618.68172.720.927418.74173.260.927218.8173.80.92718.86174.340.926818.92174.880.926618.98175.420.926419.04175.960.926219.1176.50.92619.16177.020.925819.22177.540.925619.28178.060.925419.34178.580.925219.4179.10.92519.46179.
23、620.924819.52180.140.924619.58180.660.924419.64181.180.924219.7181.70.92419.76182.220.923819.82182.740.923619.88183.260.923419.94183.780.923220184.30.92320.06184.820.922820.12185.340.922620.18185.860.922420.24186.380.922220.3186.90.92220.36187.420.921820.42187.940.921620.48188.460.921420.54188.980.9
24、21220.6189.50.92120.66190.020.920820.72190.540.920620.78191.060.920420.84191.580.920220.9192.10.9220.96192.620.919821.02193.140.919621.08193.660.919421.14194.180.919221.2194.70.91921.26195.220.918821.32195.740.918621.38196.260.918421.44196.780.918221.5197.30.91821.56197.830.917821.62198.360.917621.6
25、8198.890.917421.74199.420.917221.8199.950.91721.86200.480.916821.92201.010.916621.98201.540.916422.04202.070.916222.1202.60.91622.17203.130.915822.24203.660.915622.31204.190.915422.38204.720.915222.45205.250.91522.52205.780.914822.59206.310.914622.66206.840.914422.73207.370.914222.8207.90.91422.8620
26、8.440.913822.92208.980.913622.98209.520.913423.04210.060.913223.1210.60.91323.16211.140.912823.22211.680.912623.28212.220.912423.34212.760.912223.4213.30.91223.46213.840.911823.52214.380.911623.58214.920.911423.64215.460.911223.72160.91123.76216.540.910823.82217.080.910623.88217.620.910423.94218.160
27、.910224218.70.9124.07219.50.909824.14219.90.909624.21220.50.909424.28221.10.909224.35221.70.90924.42222.30.908824.49222.90.908624.56223.50.908424.63224.40.908224.7224.70.90824.76225.180.907824.82225.660.907624.88226.140.907424.94226.620.907225227.10.90725.06227.580.906825.12228.060.906625.18228.540.
28、906425.24229.020.906225.3229.50.90625.37230.050.905825.44230.60.905625.51231.150.905425.58231.70.905225.65232.250.90525.72232.80.904825.79233.350.904625.86233.90.904425.93234.450.9042262350.90426.07235.560.903826.14236.120.903626.21236.680.903426.28237.240.903226.35237.80.90326.42238.360.902826.4923
29、8.920.902626.56239.480.902426.63240.040.902226.7240.60.90226.76241.140.901826.82241.680.901626.88242.220.901426.94242.760.901227243.30.90127.06243.840.900827.12244.380.900627.18244.920.900427.24245.460.900227.32460.927.37246.540.899827.44247.080.899627.51247.620.899427.58248.160.899227.65248.70.8992
30、7.72249.240.898827.79249.780.898627.86250.320.898427.93250.860.898228251.40.89828.07251.950.897828.14252.50.897628.21253.050.897428.28253.60.897228.35254.150.89728.42254.70.896828.49255.250.896628.56255.80.896428.63256.350.896228.7256.90.89628.76257.430.895828.82257.960.895628.88258.490.895428.94259
31、.020.895229259.550.89529.06260.080.894829.12260.610.894629.18261.140.894429.24261.670.894229.3262.20.89429.37262.740.893829.44263.280.893629.51263.820.893429.58264.360.893229.65264.90.89329.72265.440.892829.79265.980.892629.86266.520.892429.93267.060.892230267.60.89230.07268.150.891830.14268.70.8916
32、30.21269.250.891430.28269.80.891230.35270.350.89130.42270.90.890830.49271.450.890630.562720.890430.63272.550.890230.7273.10.8930.77273.650.889830.84274.20.889630.91274.750.889430.98275.30.889231.05275.850.88931.12276.40.888831.19276.950.888631.26277.50.888431.33278.050.888231.4278.60.88831.47279.150
33、.887831.54279.820.887631.61280.430.887431.68281.040.887231.75281.650.88731.82282.260.886831.89282.870.886631.96283.480.886432.03284.090.886232.1284.70.88632.17285.260.885832.24285.820.885632.31286.380.885432.38286.940.885232.45287.50.88532.52288.060.884832.59288.620.884632.66289.180.884432.73289.740
34、.884232.8290.30.88432.88290.90.883832.96291.50.883633.04292.10.883433.12292.70.883233.2293.30.88333.28293.90.882833.36294.50.882633.44295.10.882433.52295.70.882233.6296.30.88233.68296.90.881833.76297.50.881633.84298.10.881433.92298.70.881234299.30.88134.08299.90.880834.16300.50.880634.24301.10.88043
35、4.32301.70.880234.4302.30.8834.48302.980.879834.56303.660.879634.64304.340.879434.72305.020.879234.8305.70.87934.88306.380.878834.96307.060.878635.04307.740.878435.12308.420.878235.2309.10.87835.28309.720.877835.36310.340.877535.44310.960.877335.52311.580.877135.6312.20.876935.68312.820.876635.76313
36、.440.876435.84314.060.876235.92314.680.875936315.30.875736.1316.020.875536.2316.880.875336.3317.670.87536.4318.460.874836.5319.250.874636.6320.040.874436.7320.830.874236.8321.620.873936.9322.410.873737323.20.873537.1323.980.873337.2324.760.87337.3325.540.872837.4326.320.872537.5327.10.872337.6327.880.872137.7328.660.871837.8329.440.871637.9330.220.8713383310.871138.1331.760.870838.2332.520.870538.3333.280.870238.4334.040.869938.5334.80.869638.6335.560.869338.7336.320.86938.8337.080.868738.9337.840.868
