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Technical Journals - Characterization of Carboxylic Acids in Unpolluted Streams by Gas Chromatography -- JAW_0067118Supplier: American Water Works Association (AWWA)
Description: By Lamar, William L., Goerlitz, Donald F. 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
Supplier: OMEGA Engineering, Inc.
Description: Designed for direct read flow rates, the FLD Series rotameter is a precision instrument embodying the inherent simplicity, versatility and economy of the classical rotameter. It is particularly suitable for metering carrier gases in chromatography, indicating and controlling gases in manufacturing
- 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
Description: The see-through type lamp offers a straight-line arrangement of a tungsten halogen lamp, deuterium lamp and optical system. 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
- High Intensity Discharge (HID) Lamp Type: Other
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
- Type Of Pump: Peristaltic Pumps, Positive Displacement Pumps
- Maximum Discharge Flow: 0.1300 GPH
- Power Source: AC Powered
- Media: Liquids
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
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Haskel International LLC
High pressure valves for many applications
and accessories, supplying the oil, natural gas, chemical and petrochemical industries as well as water jet cutting and blasting, aerospace, marine, government and specialty industrial markets. System components are available in every machinable alloy to handle pressures from vacuum to 150,000 PSI (10,340 bar) and temperatures from -423°F (-253°C) to 1,200°F (649°C). Any extreme application of erosive or corrosive solids, liquids or gases is where BuTech products are ideal for use. Typical... (read more)
Browse Industrial Valves Datasheets for Haskel International 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
Regulators for Low Dead-Volume Applications
Equilibar offers back pressure regulators in our Instrument Series with extremely low dead volume for use in analytical applications such as High Performance Liquid Chromatography (HPLC). These regulators utilize the 1/16" HPLC industry standard tube fittings also known Valco-style fittings. The EB1LF1 with 1/8" NPT pipe fittings has approximately 3 ml of dead volume during normal operation. However, with optional 1/16" HPLC... (read more)
Browse Pressure Regulators Datasheets for Equilibar, LLC.
Heraeus Noblelight LLC – Optics + Analytics
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 LLC – Optics + Analytics
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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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Separation of iridoids by vacuum liquid chromatography
Separation of iridoids by vacuum liquid chromatography .
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...
The toxicity and repellent properties of plant extracts used in ethnoveterinary medicine to control ticks
6.2.3 Column chromatography by vacuum liquid chromatography (VLC) 77 6.2.4 Gravity based column chromatography packed with silica gel..
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 (VLC) was first used to fractionate the extracts using solvents of different polarities with hexane –chloroform (100:0, 0:100) and then chloroform- methanol (100:0, 0:100).
Potentising and application of an extract of Melanthus Comosus against plant fungal pathogens
Vacuum liquid chromatography Wat .
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.
Poster Session 3 — Pharmacognosy
To isolate compounds in this fraction, more of the plant extract was applied to vacuum liquid chromatography .
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 .
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).
Supercritical CO2 for efficient extraction of polymethoxyflavones in Kaempferia parviflora
...3,7-dimethoxyflavone (5), 5-hydroxy-3,7,3',4'-tetramethoxyflavone (6), 3,5,7-trimethoxyflavone (7), 3,5,7,4'-tetramethoxyflavone (8) and 3,5,7,3',4'-pentamethoxy- flavone (9), were isolated by vacuum liquid chromatography and characterized using various...
Abstracts of short lectures
VACUUM LIQUID CHROMATOGRAPHY AND QUANTITATIVE IN-NMR SPECTROSCOPY OF TUMOR-PROMOTING DITERPENE ESTERS L.A. Pieters, J. Tottg, J. Corthout and A.J. Vlietinek .
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.