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三氯乙烯Cl2C=CHCl氣體測毒管134SB TRICHLOROETHYLENE 0.2-36.8ppm,檢知管法(detectortubemethod)指用試劑浸泡過的載體顆粒裝在玻璃管中,當(dāng)被測空氣以一定速度抽過此管時(shí),被測物質(zhì)與試劑發(fā)策顏色反應(yīng),然后根據(jù)顏色的深淺和色柱的長短,與標(biāo)準(zhǔn)色板或濃度標(biāo)尺進(jìn)行比較,從而作出定性和半定量的分析方法。所用載體應(yīng)具畝下列性能:(1)化學(xué)惰性,即不與被測物質(zhì)和試劑起反應(yīng);(2)質(zhì)地牢固,并能粉碎成一定大小的顆粒;(3)白色多孔或表面粗糙的固體物質(zhì)。
更新時(shí)間:2024-11-13
在線留言三氯乙烯Cl2C=CHCl氣體測毒管134SB TRICHLOROETHYLENE 0.2-36.8ppm
1. PERFORMANCE
1) Measuring range :1-16 ppm 0.2-3.2 ppm
Number of pump strokes 1(100ml) 4(400ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :0.1 ppm(400ml)
4) Shelf life :1 year (Necessary to store in a refrigerated place ; 0~10℃)
5) Operating temperature :0~40℃
6) Reading :Direct reading from the scale calibrated by 1 pump stroke
7) Colour change :Pale orange→Blueish purple
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
By reacting with an Oxidizer, Hydrogen chloride is produced and PH indicator is discoloured.
CI2C=CHCI+PbO2+H2SO4→HCI
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS
To pump
OXIDIZER
(White)
16
12
14
10
8
6
4
2 1
1000ml
ppm
Tube No.
134SB TRICHLOROETHYLENE
Substance Interference ppm Coexistence
Tetrachloroethylene FIG.1 Similar stain is produced. 2 Higher readings are given.
1,2-Dichloroethylene FIG.2 〃2 〃
Hydrogen chloride 〃2 〃
Vinyl chloride 〃40 〃
0
15
Tetrachloroethylene〔ppm〕?
FIG.1 Influence of Tetrachloroethulene
Trichloroethylene indicating value 〔ppm〕
10
10
5
5
Coexistence
Interference
0
15
1,2-Dichloroethylene〔ppm〕?
FIG.2 Influence of 1,2-Dichloroethylene
Trichloroethylene indicating value 〔ppm〕
40
10
20
5
Coexistence
Interference
(NOTE)
In case of 4 pump strokes, following formula is available for the actual concentration.
Actual concentration=1/5×Reading value.
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