New
Products
INSTRUMENTATION Autosampler Triathlon is a high-capacity, multifunction HPLC autosampler designed for routine analyses and method development. The instrument features separate needles for septum puncturing and sampling, a vialheight sensor, 160-microvial capacity, and 0.004-uL dispensing accuracy. Tray segments containing 4- or 10-mL vials can be used for large-volume injections. Jones Chromatography 1 4 1 0
Sampling Hapsite headspace sampling system is designed for on-site analysis of volatile organic compounds in soil or water. Controlled through the portable GC/MS user interface, the weatherproof unit operates on a rechargeable battery for field use or from a 24-V converter when external power is available. Twenty to twenty-five samples can be analyzed in an eight-hour day. Leybold Inf icon • 411
Defect analyzer OSDA-2000 optical shallow defect analyzer nondestructively detects and measures defects as small as 0.02 um inside a silicon wafer and 0.05 um on a silicon wafer surface prior to circuit fabrication. Two laser beams of different wavelengths are irradiated onto a silicon wafer surface,
and the scattered light created by the crystal defects is then detected. Maximum detectable depth is 5 um, and depth resolution is ±0.1 um. Hitachi • 413
beam optical geometry, a stabilized tungsten halogen source, bilaterally adjustable slits for variable bandpass, and a double monochromator. Wavelength range is from 350 to 2500 nm. McPherson • 416
Pipetting system Microlab 4200 automated pipetting system features a multiprobe head for processing 96-, 384-, 864-, and 1536-well microplates. Submicroliter volumes are delivered by 96 individual fluid paths via syringe drives, and the volume of a liquid transfer or dilution step is programmable for each 8-well row. Fixed metal probes reduce the need for disposable pipette tips. Hamilton • 414
Extraction The Soxflo solvent-extraction system, which runs three or six samples concurrently, can be used to prepare samples for GC, MS, and HPLC. The system does not require a fume hood, water cooling, solvent heating or refluxing, or a hot oil bath. Applications include foods, animal feeds, dairy products, oils, pesticides, and organic pollutants. AnalytiChem • 415
FT-IR Gemini is a dual FT-IR accessory for horizontal attenuated total-reflectance (HATR) and diffuse-reflectance analyses. The device consists of a cast aluminum optical base with two sampling heads mounted on a baseplate. An integral purge protects the optics and minimizes the adverse effects of atmospheric water vapor and carbon dioxide. No accessory realignment is necessary when switching from HATR to diffuse reflectance. Spectra - Tech 1 4 1 7
Sample concentrator EvapArray is a heated 96-well plate sample concentrator that operates from ambient temperature to 70 °C. The unit, which fits on all lab benches and inside lab hoods, features a dryer height that adjusts to accommodate deep or shallow 96-well plates. A spiral needle for enhanced drying times is available. Jones Chromatography • 418
Near-IR Near-IR spectrophotometer, designed for reflectance and transmittance measurements at varying angles, features a single-
LITERATURE Extraction
Thermal analyzer STA 449-Jupiter thermal analyzer performs DSC/DTA and TGA simultaneously on the same sample, ,liminating the effects of sample size variations, ,nhomogeneity, and gas atmosphere differences. The analyzer includes a top-loading, electromagnetic-compensation microbalance with 5-g capacity; computer-regulated valves for automatic control of pure gas atmospheres; and software packages for peak separation, reaction kinetics, and control and analysis. Temperature range is -160 to 1650 °C. Netzsch B 4 1 2
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Analytical Chemistry News & Features, April 1, 1999
Application note IST1045 describes the extraction of tissue by matrix solid-phase dispersion. Pretreatment, solvation, and analyte elution are discussed. Jones Chromatography • 4 1 9
Pesticides Application note 332 discusses accelerated solvent extraction of pesticide residues in food products. Extraction time and total solvent usage are 14-18 min per sample and 15-45 mL per sample, respectively. Up to 24 samples can be extracted unattended. Dionex • 420
Solid-phase extraction Application note IST1034 outlines a method for extracting amphetamine and methamphetamine from urine using a mixed-mode column containing both nonpolar and strong cation exchange functional groups. Jones Chromatography • 421 Microplate counters Application bibliography for TopCount microplate counters includes references for both radioisotopic and luminescence assays. Extensive cross-referencing allows the user to identify and select specific references using keywords. Packard • 422 Choline Application note 124 describes the use of ion chromatography to determine choline in dry milk and infant formula. Information is included on instrumentation, reagents, conditions, reproducibility, and sample preparation and extraction. Dionex • 423 CATALOGS Chemicals Catalog features more than 2500 products for analysis, synthesis, storage, safety, and laboratory cleaning. Nonhazardous cleaning solutions, organic-free hydrochloric acid for environmental analysis, and highpurity solvents packaged in convenient containers are highlighted. Mallinckrodt • 424 Life science Catalog includes PCR enzymes, nucleotides, tubes, plates, and thermal cyclers; electroporators; micromanipulation and microinjection systems; pipettes; and centrifuges. Eppendorf • 425 Optics Overstock parts listing includes more than 2500 windows and substrates fabricated
GC HP 6850 series GC syssem ii a ssngle-channel instrument designed for routine production analyses in the chemical, petrochemical, and petroleum industries. The system, which is less than half the width of a standard GC, is available wiih a split/splitless inlet, a flame ionization or thermal conductivity detector, and an autoinjector with an eight-sample turret. The front panel contains only six buttons, allowing users of any skiil level to select a method, start or stop a run, and obtain instrument status. Hewlett-Packard • 426
from sapphire, CaF2, BaF2, fused and crystalline quartz, germanium, and silicon. Lenses, mirrors, and substrates range in size from 0.25 to 2 in. .n diameter and from 1 to 4 mm in thickness. Meller Opttcs • 427 COLUMNS
CHEMICALS Acrylamide gels AutoPage 4.25% and AutoPage Plus 4.50% offer increased throughput in less time than standard gel runs. AutoPage Plus produces 100 bases hourly, with well-resolved read lengths of 700-800 bases in 7 hours. Sigma • 431
Reversed - phase Synchropak SCD100 3-um and RPP100 3-um reversed-phase HPLC columns are suitable for basic, mildly acidic, and neutral molecules. Use of SCD columns eliminates the need for silanol-suppressing additives. Micra Scientific • 428
RNA Primer Pairs are designed for RT-PCR analysis of mediator and receptor RNA. Each primer pair includes a 5' and 3' oligonucleotide primer in individual vials at 100-uM concentrations. Promega • 432
HPLC HPLC columns packed with 3-um particles include those for reversed-phase HPLC, ion chromatography, ion exchange, ion exclusion, and carbohydrate analysis. Column lengths of 5,10, and 15 cm are available. Hamilton • 429
Environmental analysis Accuracy performance evaluation samples are intended for QA/QC and certification applications. Included are samples for drinking-water analysis, covering VOCs, pesticides, PAHs, PCBs, dioxins, metals, ions, minerals, TOC, and turbidity. AccuStandard • 433
LC/MS Restricted Access Media, direct-injection HPLC columns provide analyte separation through a combination of size exclusion and conventional phase partitioning. The columns are suitable for processing large numbers of serum or plasma samples. Regis • 430
NEW For more information, use the Electronic Reader Service Cards found at
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