原文由 gappnj(gappnj) 发表:
楼主的样品吸附了氮气后,随压力降低很难脱附,可能对氮气发生化学吸附
如果有吸脱附详细数据表能看的更明白
我也见过这样的样品,是个西安什么大学的老师寄来的样品,记不清楚了
Isotherm Tabular Report | ||||
Relative Pressure (P/Po) | Absolute Pressure (mmHg) | Quantity Adsorbed (cm?g STP) | Elapsed Time (h:min) | Saturation Pressure (mmHg) |
06:03 | 761.1652 | |||
0.01161 | 8.837168 | 10.14155 | 06:06 | |
0.034446 | 26.22132 | 10.73486 | 06:34 | |
0.069968 | 53.26134 | 10.77338 | 06:38 | |
0.081105 | 61.74011 | 10.9196 | 06:43 | |
0.100798 | 76.73239 | 11.03728 | 06:47 | |
0.121317 | 92.35291 | 11.12267 | 06:51 | |
0.14107 | 107.3908 | 11.22264 | 06:54 | |
0.160867 | 122.4629 | 11.46539 | 06:59 | |
0.181107 | 137.8716 | 11.644 | 07:02 | |
0.200541 | 152.6688 | 12.05456 | 07:08 | |
0.248003 | 188.811 | 14.40591 | 07:30 | |
08:09 | 761.3965 | |||
14:05 | 759.803 | |||
0.309207 | 235.0446 | 80.23481 | 14:59 | |
0.345052 | 262.5175 | 96.51807 | 16:40 | |
16:42 | 760.8181 | |||
0.395978 | 301.1424 | 112.3673 | 18:08 | |
0.449945 | 342.1024 | 122.4619 | 18:58 | |
19:00 | 760.3126 | |||
0.496545 | 377.4873 | 128.0942 | 19:24 | |
0.551097 | 418.936 | 131.0146 | 19:36 | |
0.616355 | 468.5221 | 133.6014 | 19:46 | |
0.648148 | 492.6708 | 135.7621 | 19:54 | |
0.703993 | 535.1029 | 137.5233 | 20:01 | |
0.767161 | 583.1002 | 139.371 | 20:07 | |
0.800049 | 608.0861 | 140.7 | 20:11 | |
0.8207 | 623.7707 | 141.9597 | 20:15 | |
0.852052 | 647.587 | 143.1128 | 20:19 | |
0.874648 | 664.7488 | 144.277 | 20:23 | |
0.90171 | 685.3069 | 145.3816 | 20:26 | |
0.925234 | 703.1717 | 146.5336 | 20:30 | |
0.951346 | 723.0069 | 147.6087 | 20:33 | |
0.975303 | 741.2034 | 148.9363 | 20:36 | |
0.980192 | 744.9088 | 150.003 | 20:39 | |
0.992089 | 753.9428 | 151.1162 | 20:41 | |
0.997433 | 757.9652 | 162.9876 | 20:52 | |
0.983657 | 747.4861 | 154.9819 | 20:55 | |
0.960872 | 730.161 | 155.7752 | 20:58 | |
0.930824 | 707.3147 | 156.671 | 21:02 | |
21:03 | 759.8768 | |||
0.905237 | 687.832 | 158.0103 | 21:07 | |
0.880515 | 669.0204 | 158.6975 | 21:10 | |
0.855576 | 650.0542 | 159.3513 | 21:12 | |
0.830342 | 630.8489 | 160.1405 | 21:16 | |
0.806112 | 612.4156 | 160.8837 | 21:19 | |
0.781085 | 593.3782 | 161.5867 | 21:22 | |
0.73118 | 555.4443 | 162.2597 | 21:25 | |
0.680995 | 517.3004 | 162.801 | 21:28 | |
0.63091 | 479.2354 | 163.2432 | 21:31 | |
0.581099 | 441.3821 | 163.5912 | 21:34 | |
0.53148 | 403.677 | 163.8388 | 21:37 | |
0.481646 | 365.8118 | 163.9481 | 21:40 | |
0.431629 | 327.8106 | 163.886 | 21:43 | |
0.401055 | 304.5782 | 163.8229 | 21:46 | |
0.351523 | 266.9509 | 163.5495 | 21:49 | |
0.301211 | 228.7313 | 162.9803 | 21:53 | |
0.250934 | 190.5396 | 162.0533 | 21:58 | |
0.201113 | 152.697 | 160.5878 | 22:04 | |
0.151609 | 115.0982 | 158.2001 | 22:12 | |
0.103099 | 78.25291 | 153.6671 | 22:29 | |
0.082226 | 62.38371 | 148.4167 | 23:01 | |
23:24 | 758.4528 | |||
0.058536 | 44.38229 | 134.9142 | 24:09 | |
0.028534 | 21.62254 | 127.4644 | 25:22 | |
25:35 | 757.7219 | |||
0.010253 | 7.76887 | 123.7985 | 27:12 |
原文由 xindongnb(xindongnb) 发表:原文由 gappnj(gappnj) 发表:
楼主的样品吸附了氮气后,随压力降低很难脱附,可能对氮气发生化学吸附
如果有吸脱附详细数据表能看的更明白
我也见过这样的样品,是个西安什么大学的老师寄来的样品,记不清楚了
Isotherm Tabular Report Relative Pressure (P/Po) Absolute Pressure (mmHg) Quantity Adsorbed (cm?g STP) Elapsed Time (h:min) Saturation Pressure (mmHg) 06:03 761.1652 0.01161 8.837168 10.14155 06:06 0.034446 26.22132 10.73486 06:34 0.069968 53.26134 10.77338 06:38 0.081105 61.74011 10.9196 06:43 0.100798 76.73239 11.03728 06:47 0.121317 92.35291 11.12267 06:51 0.14107 107.3908 11.22264 06:54 0.160867 122.4629 11.46539 06:59 0.181107 137.8716 11.644 07:02 0.200541 152.6688 12.05456 07:08 0.248003 188.811 14.40591 07:30 08:09 761.3965 14:05 759.803 0.309207 235.0446 80.23481 14:59 0.345052 262.5175 96.51807 16:40 16:42 760.8181 0.395978 301.1424 112.3673 18:08 0.449945 342.1024 122.4619 18:58 19:00 760.3126 0.496545 377.4873 128.0942 19:24 0.551097 418.936 131.0146 19:36 0.616355 468.5221 133.6014 19:46 0.648148 492.6708 135.7621 19:54 0.703993 535.1029 137.5233 20:01 0.767161 583.1002 139.371 20:07 0.800049 608.0861 140.7 20:11 0.8207 623.7707 141.9597 20:15 0.852052 647.587 143.1128 20:19 0.874648 664.7488 144.277 20:23 0.90171 685.3069 145.3816 20:26 0.925234 703.1717 146.5336 20:30 0.951346 723.0069 147.6087 20:33 0.975303 741.2034 148.9363 20:36 0.980192 744.9088 150.003 20:39 0.992089 753.9428 151.1162 20:41 0.997433 757.9652 162.9876 20:52 0.983657 747.4861 154.9819 20:55 0.960872 730.161 155.7752 20:58 0.930824 707.3147 156.671 21:02 21:03 759.8768 0.905237 687.832 158.0103 21:07 0.880515 669.0204 158.6975 21:10 0.855576 650.0542 159.3513 21:12 0.830342 630.8489 160.1405 21:16 0.806112 612.4156 160.8837 21:19 0.781085 593.3782 161.5867 21:22 0.73118 555.4443 162.2597 21:25 0.680995 517.3004 162.801 21:28 0.63091 479.2354 163.2432 21:31 0.581099 441.3821 163.5912 21:34 0.53148 403.677 163.8388 21:37 0.481646 365.8118 163.9481 21:40 0.431629 327.8106 163.886 21:43 0.401055 304.5782 163.8229 21:46 0.351523 266.9509 163.5495 21:49 0.301211 228.7313 162.9803 21:53 0.250934 190.5396 162.0533 21:58 0.201113 152.697 160.5878 22:04 0.151609 115.0982 158.2001 22:12 0.103099 78.25291 153.6671 22:29 0.082226 62.38371 148.4167 23:01 23:24 758.4528 0.058536 44.38229 134.9142 24:09 0.028534 21.62254 127.4644 25:22 25:35 757.7219 0.010253 7.76887 123.7985 27:12
原文由 gappnj(gappnj) 发表:原文由 xindongnb(xindongnb) 发表:原文由 gappnj(gappnj) 发表:
楼主的样品吸附了氮气后,随压力降低很难脱附,可能对氮气发生化学吸附
如果有吸脱附详细数据表能看的更明白
我也见过这样的样品,是个西安什么大学的老师寄来的样品,记不清楚了
Isotherm Tabular Report Relative Pressure (P/Po) Absolute Pressure (mmHg) Quantity Adsorbed (cm?g STP) Elapsed Time (h:min) Saturation Pressure (mmHg) 06:03 761.1652 0.01161 8.837168 10.14155 06:06 0.034446 26.22132 10.73486 06:34 0.069968 53.26134 10.77338 06:38 0.081105 61.74011 10.9196 06:43 0.100798 76.73239 11.03728 06:47 0.121317 92.35291 11.12267 06:51 0.14107 107.3908 11.22264 06:54 0.160867 122.4629 11.46539 06:59 0.181107 137.8716 11.644 07:02 0.200541 152.6688 12.05456 07:08 0.248003 188.811 14.40591 07:30 08:09 761.3965 14:05 759.803 0.309207 235.0446 80.23481 14:59 0.345052 262.5175 96.51807 16:40 16:42 760.8181 0.395978 301.1424 112.3673 18:08 0.449945 342.1024 122.4619 18:58 19:00 760.3126 0.496545 377.4873 128.0942 19:24 0.551097 418.936 131.0146 19:36 0.616355 468.5221 133.6014 19:46 0.648148 492.6708 135.7621 19:54 0.703993 535.1029 137.5233 20:01 0.767161 583.1002 139.371 20:07 0.800049 608.0861 140.7 20:11 0.8207 623.7707 141.9597 20:15 0.852052 647.587 143.1128 20:19 0.874648 664.7488 144.277 20:23 0.90171 685.3069 145.3816 20:26 0.925234 703.1717 146.5336 20:30 0.951346 723.0069 147.6087 20:33 0.975303 741.2034 148.9363 20:36 0.980192 744.9088 150.003 20:39 0.992089 753.9428 151.1162 20:41 0.997433 757.9652 162.9876 20:52 0.983657 747.4861 154.9819 20:55 0.960872 730.161 155.7752 20:58 0.930824 707.3147 156.671 21:02 21:03 759.8768 0.905237 687.832 158.0103 21:07 0.880515 669.0204 158.6975 21:10 0.855576 650.0542 159.3513 21:12 0.830342 630.8489 160.1405 21:16 0.806112 612.4156 160.8837 21:19 0.781085 593.3782 161.5867 21:22 0.73118 555.4443 162.2597 21:25 0.680995 517.3004 162.801 21:28 0.63091 479.2354 163.2432 21:31 0.581099 441.3821 163.5912 21:34 0.53148 403.677 163.8388 21:37 0.481646 365.8118 163.9481 21:40 0.431629 327.8106 163.886 21:43 0.401055 304.5782 163.8229 21:46 0.351523 266.9509 163.5495 21:49 0.301211 228.7313 162.9803 21:53 0.250934 190.5396 162.0533 21:58 0.201113 152.697 160.5878 22:04 0.151609 115.0982 158.2001 22:12 0.103099 78.25291 153.6671 22:29 0.082226 62.38371 148.4167 23:01 23:24 758.4528 0.058536 44.38229 134.9142 24:09 0.028534 21.62254 127.4644 25:22 25:35 757.7219 0.010253 7.76887 123.7985 27:12
如果楼主的样品再做一次能得到好的重复性,而且仪器是没有问题的,我觉得样品应该有以下几点:
1、吸附数据第一个显示的点是P/P0=0.01,在此之前一直得不到平衡,说明吸附很不稳定,一直找不到平衡点,一直走了6个小时,才平衡到0.01。说明是样品表面是憎液的,吸附不稳定,不像是化学吸附,化学吸附比较快,且吸附很稳定。但是通过脱附数据可以看出在0.15之后很难脱附,一个点要走上半小时,甚至是快2小时,很难脱附,我觉得肯定是化学吸附了。也就是说,你的样品是憎液表面的,但是在表面有氮气化学吸附活性位点。即:同时发生了化学吸附和物理吸附。
2、你的样品是有孔的(这个解释不一定对)。0.25-0.30一个点做了一个半小时,而且这时候吸附量开始大幅上升,我的水平只能是理解成发生凝聚了,但是应该不像,因为一来凝聚不用这么长时间,二来,凝聚的是能脱附掉的,但是在最后脱附到0.01的时候还有123ml的吸附量,这个我想了很久,解释不了,抱歉~~~
你可以问下我们总工,他水平比我高,但是他不上这个网站,如果你愿意,你可以找金埃谱吧