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臭氧O3气体测毒管182U OZONE 0.025-3.0ppm
臭氧属于有害气体,浓度为 6.25×10mol/L(0.3mg/m3 ) 时,对眼、鼻、喉有刺激的感觉;浓度 (6.25-62.5)×10 -5 mol/L(3 ~ 30mg/m3 ) 时,出现头疼及呼吸器官局部麻痹等症 ; 臭氧浓度为 3.125×10 -4 ~ 1.25×10 -3 mol/L(15 ~ 60mg/m 3 ) 时 , 则对人体有危害。其毒性还和接触时间有关,例如*接触 1.748×10 -7 mol/L(4ppm) 以下的臭氧会引起*性心脏障碍,但接触 20ppm 以下的臭氧不超过 2h ,对人体无*性危害。因此,臭氧浓度的允许值定为 4.46×10 -9 mol/L(0.1ppm)8h. 由于臭氧的臭味很浓,浓度为 4.46×10 -9 mol/L(0.1ppm) 时,人们就感觉到,因此,世界上使用臭氧已有一百多年的历史,至今也没有发现一例因臭氧中毒而导致死亡的报道。
Tube 82U
1. PERFORMANCE
1) Measuring range :0.15-3.0 ppm 0.05-1.0 ppm 0.025-0.5 ppm
Number of pump strokes 1(100ml) 3(300ml) 6(600ml)
2) Sampling time :3 minutes/3 pump strokes
3) Detectable limit :0.01 ppm(600ml)
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Reading :Direct reading from the scale calibrated by 3 pump strokes
7) Colour change :Blue→White
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Indigo is oxidized and Isatin is produced.
4. CALIBRATION OF THE TUBE
COLOURIMETRY METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
0.1
0.05
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
ppm
300ml
GAS To pump
182U OZONE
Substance Interference ppm Coexistence
The top of discoloured layer
Nitrogen dioxide Similar stain is produced. 0.5 becomes unclear and higher
FIG.1 readings are given.
Chlorine 〃10
Oxidant Similar stain is produced and this
has same sensitivity with Ozone.
(NOTE)
In case of 1 or 6 pump strokes, following formula is available for actual concentration.
Actual concentration=Reading value ×
0
0.4
0.6
0.2
Nitrogen dioxide〔ppm〕�
FIG.1 Influence of Nitrogen dioxide
Ozone indicating value 〔ppm〕
0.5 1.0
3
Number of strokes
C
NH
HN
C
O
=�
O
C
=�
=C
C
NH
C
O
=�
+2O3 � 2 =O+2O2