Data are presented which show that when a polymer contains an appreciable amount of low molecular weight species below the diffusion limit of the osmometer membrane, the osmotic molecular weight, Mn, is generally higher than the Mn calculated from gel-permeation chromatography (GPC). Experiments ...
Product nameMeasured with polystyrene (eluent: THF) Target molecular weight rangeExclusion limit GPC KF-401HQ 100 - 700 1,500 GPC KF-402HQ 200 - 1,500 4,000 GPC KF-402.5HQ 300 - 10,000 20,000 GPC KF-403HQ 600 - 50,000 70,000Operation...
( r=0.9997) , showed good linearity.Injecting the solution of spiked 50 μg/kg six times, the relative standard deviation was 2.68%.The limit of detection and limit of quantization were 3 μg/kg and 10 μg/kg.At the spiked level of 10 , 50 and 200 μg/kg, the recoveries were ...
(g/mol) 18229 21348 MW Ranges Calculated Peak Number 1 1 1 Peak Information Baseline region 1 Baseline region 2 High Limit MW 74275 24000 16000 Low Limit MW 24000 16000 8000 Percent MW 7.96 34.59 51.44 Start (mins) 17.33040 38.70000 End (mins) 21.87360 40.86720 Mv (g/mol) 17829 PD ...
对于右旋糖酐,以右旋糖酐40为例,要求以葡萄糖峰计算的理论塔板数不小于5000;10%大分子部分重均分子量不得大于120000,10%小分子部分重均分子量不得小于5000。这些校正曲线的建立和样品分子量的计算均可以在AgilentGPC/SEC软件(A.02.01)中完成。实验部分试剂和样品肝素钠对照品使用USP标准品。葡萄糖、葡萄糖2000、...
Bearing Number Dimensions Basic load ratings Max speed Fatigue load limit Pu dw dg Dw Dg H dynamic C static CO grease oil N mm N r/min 51100 Series 51100 10 11 24 24 9 7900 11200 4900 6600 1 51101 12 13 26 26 9 8300 12200 4600 6300 0.81 5110...
Testing performed to the limits of device specification in temperature and limit value. End Point Requirements 0 Fails Minimum Sample Size (Note 1) All AEC-Q100- ElectroStatic Discharge/ 002 Human Body Model Classification (HBM): Required ?: Yes Test @ 250/500/1000/1500/2000/3000/4000 Volts ...
August 10, 2019 Laurent, the top limit on suggested dosage for Alpha GPC is 1,200 mg per day. Divided into 2 or 3 doses. Ritalin in my opinion is a great solution for someone who is clinically Adult ADD. But its not for everybody. It is possible to control ADD symptoms with just...
Consequently, long chain branching does not appear before a limiting molecular weight of about 50,000. Beyond this limit, is 0.5 脳 10-4, with no dependence on molecular weight, which resembles low density polyethylene.doi:10.1002/app.1984.070290512D. Lecacheux...