起订量:
149 甲基丙烯酸乙酯检测管149
免费会员
经销商 本公司产品广泛应用于质量认证机构、电力、电信、电气制造、冶金、机电、铁路、石化、建筑、工程、环保、食品、机械等领域及各类仪器仪表生产厂家。为科研、生产、工程等企事业单位提供了大量的高精度、可靠便利的测试测量工具和解决方案。
面对广阔的国内外市场,公司将以不懈的努力,积极做好充分的准备,秉承“诚心*、客户*”的宗旨,努力营造一个具有自己*的经营特色、客户满意放心的、集售前售后服务为一体的综合性平台。我们真诚的希望与国内外各界朋友广泛开展技术和经济等领域的合作,携手并进,共创辉煌。
的详细介绍
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% |