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甲苯C6H5CH3氣體測(cè)毒管124SB TOLUENE 2-100ppm,測(cè)量精度高:在檢測(cè)管含量標(biāo)度的確定上模擬了現(xiàn)場(chǎng)分析條件,采用不同標(biāo)準(zhǔn)氣標(biāo)定,克服了化學(xué)分析中易帶入的方法誤差。同時(shí)減少了人為誤差。該方法準(zhǔn)確度誤差一般有效量程為5%~15%,PPM(10-6)數(shù)量級(jí)的測(cè)量有優(yōu)勢(shì)。分析速度快:由于操作方便,使得每一次分析所需時(shí)間大為縮短,一般僅需十幾分鐘即可得知結(jié)果,其分析速度是任何化學(xué)分析和儀器方法不能比擬的。
更新時(shí)間:2024-12-26
在線留言甲苯C6H5CH3氣體測(cè)毒管124SB TOLUENE 2-100ppm
1. PERFORMANCE
1) Measuring range :2-100 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :1 ppm
4) Shelf life :3 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(0~10℃)(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :White→Brown
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
C6H5CH3+I(xiàn)2O5+H2SO4→I2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
ppm
100
80
60
40
30
20
10
5
2
GAS To pump
Tube No.
124SB TOLUENE
0
100
50
Xylene〔ppm〕?
FIG.1 Influence of Xylene
Toluene indicating value 〔ppm〕
50 100
Interference
0
100
50
Ethyl benzene〔ppm〕?
FIG.2 Influence of Ethyl benzene
Toluene indicating value 〔ppm〕
50 100
Interference
Substance Interference Coexistence
Aromatic hydrocarbons FIG.1,FIG.2 Similar stain is produced. Higher readings are given.
Double-layer stain is produced. If
Hexane the brown stain is clear, the readings
can be obtained by it.
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 5℃ 15-40℃
(ppm) (32°F) (80°F) (95-104°F)
100 150 125 100
80 120 100 80
60 85 75 60
40 55 45 40
30 40 35 30
20 28 23 20
10 13 10 10
5 6 5 5
2 2 2 2
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