149 甲基丙烯酸乙酯檢測(cè)管149
- 公司名稱 上海儀在機(jī)電科技有限公司
- 品牌
- 型號(hào) 149
- 產(chǎn)地
- 廠商性質(zhì) 經(jīng)銷商
- 更新時(shí)間 2018/6/8 1:49:13
- 訪問(wèn)次數(shù) 556
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甲基丙烯酸乙酯檢測(cè)管149
的詳細(xì)介紹
CH2:C(CH3)CO2CH3
Performance |
Measuring Range | 10 to 200 ppm | 200 to 500 ppm |
Number of PumpStrokes | 2 | 1 |
CorrectionFactor | 1 | 2.5 |
Sampling Time | 4 minutes per pumpstroke | |
Detecting Limit | 1 ppm (n=2) | |
Color Change | Yellow → Paleblue | |
Reaction Principle | CH2:C(CH3)CO2CH3 + Cr6+ + H2SO4 → Cr3+ | |
Coefficient ofVariation | 10% (for 10 to 50ppm), 5% (for 50 to 200 ppm) | |
ShelfLife | 2Years | |
Correctionsfor temperature & humidity | Temperature correction is necessary | |
Store the tubes at cool and darkplace. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Alcohols, Esters,Ketones | - | Plus error | Produce pale bluediscoloration |
Othersubstance measurable with this detector tube |
Tube 149 Reading(n=2) | 10 | 20 | 30 | 50 | 100 | 150 | 200 |
Allyl isothiocyanateconc. (ppm) | 5 | 10 | 15 | 30 | 70 | 130 | 200 |
Calibration gasgeneration | Diffusion tubemethod |
TLV-TWA | TLV-S | Explosive range |
50ppm | 100ppm | 1.7 to8.2% |