甲基異丁基酮(CH3)2CHCH2COCH3檢測管152D
甲基異丁基酮(CH3)2CHCH2COCH3檢測管152D,GASTEC甲基異丁基酮(CH3)2CHCH2COCH3檢測管152D檢測范圍4-1200ppm,檢測管檢測時間在1-10小時左右。甲基異丁基酮(CH3)2CHCH2COCH3檢測管152D采用自然擴散的方式。甲基異丁基酮(CH3)2CHCH2COCH3檢測管152D其特點:簡潔,輕巧,方便多用、直接讀數(shù)、不需取樣設(shè)備。
被動擴散式檢測管是用來測定較長時間下氣體濃度的時量平均值(TWA),采用自然擴散的方式。
這種檢測管里面填充有吸附劑及反應(yīng)劑,氣體以一定的速率被均勻吸附,從而出現(xiàn)較為明顯均勻的變色
檢測工作場所人員的***氣體暴露量時,用右圖的檢測管夾(710)放置在人員衣領(lǐng)處即可。
檢測***氣體在工作場所的分布時,把該檢測管固定放置一段時間后就可檢測出來。也可用來進(jìn)行更長時間的檢測
Performance
Measuring Range |
2 to 600 ppm |
Sampling Hours |
1 to 10 hours |
Detecting Limit |
2 ppm (10 hours) |
Colour Change |
Yellow → Reddish Brown |
Reaction Principle |
CH3COCH3 + (NH2OH)3H3PO4 → H3PO4
H3PO4 + Base → Phosphate |
Coefficient of Variation |
10% (for 20 to 600 ppm-hr) |
Shelf Life |
2 Years |
Correcti*** for temperature & humidity |
Temperature correction is necessary |
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
Substance |
Concentration |
Interference |
Change colour by itself to |
Aldehydes |
|
+ |
Reddish brown |
Ketones |
|
+ |
Reddish brown |
Acid gases |
|
+ |
Reddish brown
(Unclear demarcation) |
Other substance measurable with this detector tube
Substance |
Correction Factor |
Measuring Range |
Acetone |
0.7 |
1.4 to 420 ppm |
Methyl isobutyl ketone |
2.0 |
4 to 1200 ppm |
Acetaldehyde |
0.6 |
1.2 to 360 ppm |
Calibration gas generation |
Diffusion tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
200 ppm |
300 ppm |
1.7 to 11.4% |
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