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1、硝酸浓度与比重对照表(20/4)波美度Be比重HNO3(%)每升酸含HNO3克数波美度Be比重HNO3(%)每升酸含HNO3克数0.53.67.511.315.018.522.123.524.926.227.528.729.831.032.133.234.335.336.337.238.11.00361.02561.05431.08421.11501.14691.18001.19341.20711.22051.23351.24631.25911.27191.28471.29751.31001.32191.33361.34491.356010152025303234363840424446485
2、05254565810.0451.28105.4162.6223.0286.7354.0381.9410.4439.4468.7498.5528.8559.6591.0622.8655.0687.4720.1753.1768.538.939.740.441.141.842.443.043.644.144.745.145.646.146.546.847.247.547.848.048.449.21.36671.37691.38661.39591.40481.41341.42181.42981.43751.44501.45211.45891.46551.47161.47731.48261.4873
3、1.49121.49521.50081.51296062646668707274767880828486889092949698100820.0853.7887.4921.3955.3989.41024.010581093112711621196123112661300133413681402143514711513硝酸浓度与比重对照表(20/4)波美度Be比重HNO3(%)每升酸含HNO3克数波美度Be比重HNO3(%)每升酸含HNO3克数0.53.67.511.315.018.522.123.524.926.227.528.729.831.032.133.234.335.336.337.2
4、38.11.00361.02561.05431.08421.11501.14691.18001.19341.20711.22051.23351.24631.25911.27191.28471.29751.31001.32191.33361.34491.35601015202530323436384042444648505254565810.0451.28105.4162.6223.0286.7354.0381.9410.4439.4468.7498.5528.8559.6591.0622.8655.0687.4720.1753.1768.538.939.740.441.141.842.443.
5、043.644.144.745.145.646.146.546.847.247.547.848.048.449.21.36671.37691.38661.39591.40481.41341.42181.42981.43751.44501.45211.45891.46551.47161.47731.48261.48731.49121.49521.50081.51296062646668707274767880828486889092949698100820.0853.7887.4921.3955.3989.41024.010581093112711621196123112661300133413
6、681402143514711513C=1000PW/M 其中C是物质的量浓度 P是硝酸的密度，注意单位是g/ml W指的是硝酸的质量分数，也就是65%-68%，M指的是硝酸的摩尔质量（63g/mol) Densities of Sulfuric AcidPercent Mass Sulfuric Acid to WaterDensity per g cm-3 100.0 %1.830594.0 %1.831290.0 %1.814484.0 %1.769380.0 %1.727274.0 %1.657470.0 %1.610564.0 %1.542160.0 %1.498754.0 %1.4
7、35150.0 %1.395244.0 %1.338640.0 %1.302834.0 %1.251830.0 %1.219124.0 %1.171420.0 %1.139814.0 %1.087410.0 %1.06615.0%1.03181.0 %1.0049浓度单位的换算公式： 1）当量浓度=1000.d.质量百分浓度/E 2）质量百分浓度=当量浓度E/1000.d 3）摩尔浓度=1000.d质量百分浓度/M 4）质量百分浓度=质量-体积浓度（毫克/升）/104.d 5）质量-体积浓度（mg/L）=104质量百分浓度 5、ppm是重量的百分率，ppm=mg/kg=mg/L 即:1ppm=1ppm=1000ug/L 1ppb=1ug/L=0.001mg 式中：E溶质的克当量； d溶液的比重； M溶质的摩尔质量； 体积浓度是用每立方米的大气中含有污染物的体积数（立方厘米）或（ml/m3）来表示， 常用的表示方法是ppm，即1ppm=1立方厘米/立方米=10-6。除ppm外，还有ppb和ppt， 他们之间的关系是： 1ppm=10-6=一百万分之一， 1ppb=10-9=十亿分之一 ， 1ppt=10-12=万亿分之一， 1ppm=103ppb=106ppt
