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测定物质 |
CH3CO2C4H9乙酸正丁?/span> |
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测定范围 |
10-400ppm |
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取气野/span> |
100ml |
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测定时间 |
1.5分钟/100ml |
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检测限?/span> |
10ppm |
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颜色变化 |
淡黄色→浅蓝艱/span> |
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有效朞/span> |
1平/span> |
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反应原理 |
CH3CO2C4H9+CR6++H2SO4->CR3+ |
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使用温度范围 |
10,/span>40ℂ/span>(温度校正) |
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其它影响物质 |
名称 |
影响浓度ppm |
影响结果 |
酯类 |
指示偏高 |
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醇类 |
指示偏高 |
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酮类 |
指示偏高 |
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芳香烂/span> |
指示偏高 |
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测定操作 |
①打通检测管两端 ②按检测管上箭头方向将其插入吸气泵前端 ③将红线与轴线对齏/span> ④根据所需检测范围抽取定量气体、/span> ④/span>抽取100ml气体时手泵的红色指示器弹出就说明气体已全部进入检测管中,需要多次采集气体时将手柄推回去,同样方法采集即?/span> ⑥取下检测管,读倻/span>ppm 如果取气量增多,则重复③-⑤操作步骤 |
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浓度换算 (ppm咋/span>mg/m3之间) |
C6H5OH: 测定浓度'/span>mg/m3(/span>=3.91测定浓度'/span>ppm(/span>(需要温度校止/span>) C6H4(CH3)OH: 测定浓度'/span>mg/m3(/span>= 4.5测定浓度'/span>ppm(/span>(需要温度校止/span>) |
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使用环境 |
温度:需校正 |
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湿度:无影响 |
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气压:读取值(ppm?#215;1013'/span>hpa(/span>/测定点的气压'/span>hpa(/span> |
温度校正表(20℃基准)
读取倻/span> '/span>ppm(/span> |
真实浓度ppm |
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10ℂ/span> |
15ℂ/span> |
20ℂ/span> |
30ℂ/span> |
40ℂ/span> |
|
25.0 |
31.2 |
27.8 |
25.0 |
21.8 |
18.8 |
20.0 |
24.5 |
22.3 |
20.0 |
17.5 |
15.0 |
15.0 |
18.4 |
16.7 |
15.0 |
13.1 |
11.3 |
10.0 |
12.3 |
11.1 |
10.0 |
8.8 |
7.5 |
5.0 |
6.1 |
5.6 |
5.0 |
4.4 |
3.8 |
3.0 |
3.7 |
3.3 |
3.0 |
2.6 |
2.3 |
1.0 |
1.2 |
1.1 |
1.0 |
0.9 |
0.8 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
图一:是酚类对酚检测管*后读值的影响的示意图。纵轴:酚浓?/span>横轴9/span>o-甲酚浓度
图二:是氨对苯检测管*后读值的影响的示意图。纵轴:酚浓?/span>横轴:氨浓度
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