摘要:
A chromatographic flow cell having the capacity to handle fluid flow from one or more chromatographic systems, at widely varying flow rates without the need to change flow cells or detectors. The flow cell itself acts as a tee where two or more fluidic inlet lines intersect with a common inlet channel. The common inlet channel is configured so that the diameter and length minimizes the total volume, unswept volume, bandspreading, and backpressure. The common outlet channel, inlet lines and the outlet line are sized to provide for adequate fluidic handling at the varied flow rates.
摘要:
Provided is an analysis method for mycotoxins including a separation step, a detection step, and an identification step. In the separation step, each component contained in a liquid sample is separated in a column (3). In the detection step, components separated in the separation step are detected by a PDA (7) and a fluorescence detector (8). In the identification step, total aflatoxin is identified based on a detection signal from the fluorescence detector (8), and deoxynivalenol is identified based on a detection signal from the PDA (7).
摘要:
The molecular weight distribution in a polymer sample can be used as a measure for when parts need to be replaced, and can be tracked over time to allow for predicting when parts need to be replaced and/or identifying the type of aging taking place in the polymer part. Molecular weight distribution determination has particular application in determining the replacement time and or aging parameters in polyamide (e.g., formed from 11-aminoundecanoic acid or formed from 12 aminododecanoic acid) polyvinyldiflouride, and polyethyelene pipe liners used in, for example, offshore oil and gas production and fuel transport operations.
摘要:
A chemical detector for rapid, simultaneous detection of multiple chemicals including chemical warfare agents, toxic industrial chemicals, and explosives having one or more gas chromatography columns each with a chemosorbent or a chemo-reactive stationary phase and an infrared-transparent base, a bright infrared light source, a mechanism to direct the light source to any point along any of the columns, and an infrared sensor. Another disclosed detector has one or more gas chromatography columns each on the surface of a substrate having at least one infrared-transparent waveguide pattern, a bright infrared light source, and at least one ring resonator for each column, where each ring resonator is coated with a chemosorbent or a chemo-reactive stationary phase, and where each ring resonator spectroscopically probes the stationary phase. Also disclosed are the related methods for chemical detection.
摘要:
Ein UV/VIS HPLC-Photometer besitzt eine Nano-Durchflusszelle, wobei eine Lichtquelle einen Referenz- und eine Sample-Lichtkanal speist und zur Auswertung des Referenzkanals eine Referenzphotodiode und zur Auswertung des Samplelichtkanals, der durch die Nano-Durchflusszelle (10) geführt ist, eine Samplephotodiode (22) vorgesehen ist. Um ein Photometer zu schaffen, dessen Signalauswertung verbessert ist, wird vorgeschlagen, dass die Belichtungszeiten der Samplephotodiode (22) und der Referenzphotodiode getrennt voneinander einstellbar sind und die Belichtungszeit der Samplefotodiode gegenüber der Referenzfotodiode grösser gewählt ist.
摘要翻译:甲UV / VIS HPLC光度计具有纳米流通池,其特征在于,光源馈送的基准和样本光信道和所述参考信道的评价,基准光电二极管和用于这是通过纳米流动池(10)引导的样本光信道的评价, 提供样品光电二极管(22)。 为了提供一个光度计,信号评价得到改善,所以建议所述样本光电二极管(22)的曝光时间和参考光电二极管可以彼此分开设置并且被选择,则样本光电二极管的曝光时间相对于所述参考光电二极管越大。