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Technical Journals - Characterization of Carboxylic Acids in Unpolluted Streams by Gas Chromatography (PDF) -- JAW_0067118Supplier: American Water Works Association (AWWA)
Description: This article reports on research conducted by the U.S. Geological Survey to improve techniques for the separation, identification, and measurement of natural organic compounds in water. This research involves continuous liquid-liquid extraction and vacuum evaporation of water samples from
Supplier: Heraeus Noblelight America LLC
Description: Vacuum UV (VUV) lamps are deuterium lamps that are especially designed to supply deep UV light down to a wavelength of 115nm. This makes them the ideal light source for high-precision absorption measurement, e.g. with UV/VIS spectrophotometers and high-pressure liquid chromatography (HPLC). Our
- Lamp Power: 30 watts
- Wavelength Range: 115 to 400 nm
- Maximum Overall Length: 5.51 to 5.67 inch
Supplier: OMEGA Engineering, Inc.
Description: at inlets (bottom) for liquids valves may be positioned either at inlets or outlets (top). For vacuum services, valves must be mounted at outlets. If unspecified at the time of ordering, meters will be shipped with valves mounted at the inlets.
- Type: Differential Pressure Meter, Rotameter, Variable Area
- Pipe Diameter: 0.1250 inch
- Media Temperature Range: 250 F
- Liquid Volumetric Flow Rate: 1.32E-4 to 0.4500 GPM
Supplier: IDEX Health & Science
Description: Our MINI Degassing Chamber is the ideal solution to keep bubbles out of liquid chromatography pumps and ensure a stable baseline. Systec® AF is compatible with a wide range of typical solvents used in HPLC and offers a chemically inert flow path.
Supplier: Pickering Laboratories, Inc.
Description: controlled vacuum pump and vacuum control; 100-110 VAC, 60 Hz. Column, rack, accessories are quoted separately. Gel permeation chromatography is a well-known technology for the removal of fats, proteins, and other large bio-molecules from samples in order to prevent interference in the analysis
Supplier: Control Company
Description: Compact, variable-flow, bi-directional, self-priming, peristaltic pumps offer precise flow deliveries. Ideal for use with conductivity flow-thru cells, liquid chromatography, collecting fractions, pH/circulating fluids or buffers in baths, and moving corrosive materials. They provide outstanding
- Pump Type: Other
- Maximum Discharge Flow: 37.5 GPH
- Media Temperature: 200 F
- Power Source: AC Powered
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Heraeus Noblelight America LLC
Deuterium lamps provide an almost continuous light spectrum ranging from UV (185 to 400 nm) and discrete lines around this. This makes them the ideal light source for high-precision absorption measurement, e.g. with UV/VIS spectrophotometers and high-pressure liquid chromatography (HPLC). Our experts cooperate closely with instrument manufacturers to optimize the lamp for the particular application and the specific operating conditions in the instrument. Heraeus deuterium lamps: 1000 or 2000... (read more)
Browse Lamps Datasheets for Heraeus Noblelight America LLC
Honeywell Sensing and Control
Honeywell TruStability® HSC Series Pressure Sensor
at approximately 2 kHz. The HSC Series is calibrated over the temperature range of 0 °C to 50 °C [32 °F to 122 °F]. The sensor is characterized for operation from a single power supply of either 3.3 Vdc or 5.0 Vdc. These sensors measure absolute, differential, and gage pressures. The absolute versions have an internal vacuum reference and an output value proportional to absolute pressure. Differential versions allow application of pressure to either side of the sensing diaphragm. Gage... (read more)
Browse Pressure Sensors Datasheets for Honeywell Sensing and Control
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Primary Vacuum Pumping in Mass Spectrometry Systems (.pdf)
, and the requirements (if any) for oil; regulatory compliance; cleanliness of the vacuum produced; and compatibility with process and target gases-vapors. MS systems have very specific vacuum (physics and engineering) requirements. The systems primarily considered here are liquid chromatography-MS (LC-MS
Product Technology News
; lateral force microscopy; and electrical force microscopy. The Accurex IIL is a laboratory version designed for research and industrial applications. The DX-800 combines the capabilities of ion chomatography and high-performance liquid chromatography to determine analytes such as inorganic anions
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Natural Products Isolation
These fractions may be obvious, physically discrete divisions, such as the two phases of a liquid–liquid extraction (see Chap. 10) or they may be the contiguous eluate from a chromatography column, e.g., vacuum liquid chromatography (VLC), column chromatography (CC), size-exclusion …
6.2.3 Column chromatography by vacuum liquid chromatography (VLC) 77 6.2.4 Gravity based column chromatography packed with silica gel..
Purification of citrus limonoids and their differential inhibitory effects on human cytochrome P450 enzymes
Major aglycones such as limonin and nomilin were isolated from seeds by direct crystallization and minor limonoids were purified by vacuum liquid chromatography .
Chemopreventive Potential of Flavonoid Extracts from Plantation‐Bred and Wild Aronia melanocarpa (Black Chokeberry) Fruits
ABSTRACT: European plantation‐bred (cultivated) and local Illinois (wild) Aronia melanocarpa (chokeberry) fruits were extracted with 70% aqueous acetone and separated into 6 fractions using vacuum liquid chromatography (VLC) over a Toyopearl (TP) polymer column.
The vasodepressor function of the kidney: prostaglandin E2 is not the principal vasodepressor lipid of the renal medulla
Methods: A chloroform extract of porcine kidney medulla was fractionated by gradient vacuum liquid chromatography (VLC) and analysed by capillary GC‐MS for the presence of prostaglandins (detection limit: 2.2 ppm).
Natural Products Isolation
Complex extracts can,in the first instance, be separated by vacuum liquid chromatography , flash chroma- tography, or column chromatography prior to PTLC.
Vacuum liquid chromatography Wat .
Combination of Bioautography with HPTLC–MS/NMR: A Fast Identification of Acetylcholinesterase Inhibitors from Galbanum †
Method Pre‐fractionation of the dichloromethane extract was performed by vacuum liquid chromatography .
Anti‐inflammatory Activities of Eleven Centaurea Species Occurring in the Carpathian Basin
The n-hexane extract (CSE-3) was further fractionated by vacuum liquid chromatography on silica gel (SiO2 60 G, 15 mm, Merck 11677), using the gradient system of n-hexane – EtOAc – MeOH of increasing polarity gaining the fractions CSE-3 …
The use of silica gel coated with liquid paraffin as a stationary phase for chromatographic analysis of phytochemicals
(i) Vacuum liquid chromatography : A 3X 5 cm diameter bed of the silica gel coated with liquid paraffin was made using water to form a slurry, and vacuum liquid chromato- graphy carried out using the standard procedure (Pelletier et al., 1986).
Investigations into the Phenolic Constituents of Dog's Mercury ( Mercurialis perennis L.) by LC‐MS/MS and GC‐MS analyses
By implementation of preparative chromatography on polyamide pretreated with formic acid followed by vacuum liquid chromatography on reversed‐phase C18‐silica, one of the predominant depsides was isolated as a pure compound.
Neuroprotective effects of a sesquiterpene lactone and flavanones from Paulownia tomentosa Steud. against glutamate‐induced neurotoxicity in primary cultured r...
Vacuum liquid chromatography was carried out on silica gel 60 [Scientific Adsorbents Incorporated (SAI), particle size 32–63 mm, pore size 60 Å].
Poster Session 3 — Pharmacognosy
To isolate compounds in this fraction, more of the plant extract was applied to vacuum liquid chromatography .
Production of hydrophilic phytotoxins by Mycosphaerella fijiensis
The lyophilized culture filtrate is initially treated with activated charcoal, then successively purified using vacuum liquid chroma- tography and semipreparative high performance liquid chromatography.