丁酮檢測(cè)管152D 日本GASTEC
詳細(xì)介紹
丁酮檢測(cè)管152D,GASTEC丁酮檢測(cè)管152D檢測(cè)范圍2-600ppm,刻度范圍20-600ppm.檢測(cè)管檢測(cè)時(shí)間在1-10小時(shí)左右。丁酮檢測(cè)管152D采用自然擴(kuò)散的方式。其特點(diǎn):簡(jiǎn)潔,輕巧,方便多用、直接讀數(shù)、不需取樣設(shè)備。
被動(dòng)擴(kuò)散式檢測(cè)管是用來(lái)測(cè)定較長(zhǎng)時(shí)間下氣體濃度的時(shí)量平均值(TWA),采用自然擴(kuò)散的方式。
這種檢測(cè)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(cè)工作場(chǎng)所人員的有害氣體暴露量時(shí),用右圖的檢測(cè)管夾(710)放置在人員衣領(lǐng)處即可。
檢測(cè)有害氣體在工作場(chǎng)所的分布時(shí),把該檢測(cè)管固定放置一段時(shí)間后就可檢測(cè)出來(lái)。也可用來(lái)進(jìn)行更長(zhǎng)時(shí)間的檢測(cè)
Methyl ethyl ketone | 52D |
CH3COC2H5 |
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 |
Corrections 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-S | Explosive range |
200 ppm | 300 ppm | 1.7 to 11.4% |
丁酮檢測(cè)管152D 日本GASTEC