SPE cartridge removing pigments from plant extract samples

SPE Cleanup for Removal of Pigments from Plant Extracts

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Pigments Commonly Present in Plant Extracts Plant extracts present a complex analytical challenge due to their rich pigment content, primarily chlorophylls and carotenoids. Chlorophylls, the green photosynthetic pigments, exist in several forms including chlorophyll a and b, each with distinct chemical structures and polarities. Carotenoids encompass both carotenes (non-polar hydrocarbons like β-carotene) and xanthophylls (oxygen-containing […]

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laboratory SPE preparation workflow for metabolomics analysis

Sample Preparation Workflow for Metabolomics Studies Using SPE

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Overview of Metabolomics Sample Preparation Requirements Metabolomics studies present unique challenges in sample preparation due to the vast chemical diversity of metabolites present in biological systems. These small molecules span an enormous range of physicochemical properties, from highly polar amino acids and organic acids to non-polar lipids and steroids. The primary goals of metabolomics sample

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Technician installing compatible cold cathode vacuum gauge on system

How to Reduce Maintenance Costs with Compatible Replacement Gauges

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How to Reduce Maintenance Costs with Compatible Replacement Gauges In high-volume vacuum systems—whether in mass spectrometry, semiconductor tools, vacuum heat treatment, or scientific instrumentation—replacement vacuum gauges represent a recurring and often hidden cost center. Original equipment manufacturer (OEM) gauges from established brands frequently carry premium pricing, long lead times, and proprietary interfaces that lock users

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Vacuum gauge installed in reactive gas industrial chamber

Vacuum Gauge Material Compatibility in Reactive Gas Environments

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Vacuum Gauge Material Compatibility in Reactive Gas Environments In vacuum-dependent industries such as semiconductor processing, thin-film deposition, mass spectrometry, and vacuum heat treatment, the choice of vacuum gauge materials directly determines measurement reliability, maintenance intervals, and total cost of ownership. Reactive gases—including halogens, fluorinated compounds, and hydrogen-bearing species—can accelerate electrode corrosion, filament degradation, or seal

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SCADA screen displaying vacuum pressure data from transmitters

Integrating Vacuum Transmitters into SCADA Monitoring Systems

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Integrating Vacuum Transmitters into SCADA Monitoring Systems In modern industrial vacuum processes—from semiconductor fabrication and mass spectrometry to vacuum heat treatment and scientific instrumentation—real-time monitoring is essential for process stability, safety, and yield optimization. Vacuum transmitters such as the VG-SP205 Pirani Vacuum Transmitter and VG-SM225 Cold Cathode Vacuum Transmitter from Poseidon Scientific deliver reliable, cost-effective

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SPE extraction workflow analyzing veterinary drug residues in food samples

SPE Sample Preparation for LC-MS Analysis of Veterinary Drugs

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1. Veterinary Drugs Commonly Monitored in Food Products The analysis of veterinary drug residues in food products represents a critical component of food safety monitoring programs worldwide. These compounds span multiple therapeutic classes, each presenting unique analytical challenges for LC-MS detection. The most commonly monitored veterinary drugs include: Antibacterial Agents Sulfonamides (sulfamethazine, sulfadimethoxine), tetracyclines (oxytetracycline,

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laboratory SPE wash step improving sample cleanup efficiency

Optimizing SPE Wash Steps to Improve Sample Cleanup

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Role of Wash Steps in SPE Workflows Solid-phase extraction (SPE) wash steps serve as the critical bridge between sample loading and analyte elution, functioning as the primary mechanism for removing matrix interferences while preserving target compounds. As described in SPE literature, “To remove unwanted, weakly retained materials, wash the packing with solutions that are stronger

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Vacuum gauge calibration setup in industrial lab

Best Practices for Vacuum Gauge Calibration in Production Facilities

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In high-volume vacuum production environments—semiconductor fabs, PVD coating lines, and vacuum heat-treatment facilities—gauge calibration is not a periodic checkbox but a cornerstone of process capability. A drifting vacuum gauge can introduce pressure offsets that cascade into film-thickness variation, etch-depth errors, or inconsistent hardness profiles, directly eroding yield and increasing scrap costs. Poseidon Scientific designed the

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SPE cartridge concentrating trace contaminants from environmental water samples

Using SPE to Concentrate Trace Contaminants in Environmental Samples

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Environmental Contaminants Monitored at Trace Levels Environmental monitoring programs routinely target contaminants at part-per-billion (ppb) and part-per-trillion (ppt) concentrations. These trace-level pollutants include pesticides (triazines, organophosphates, carbamates), pharmaceuticals, industrial chemicals (PCBs, PAHs, phenols), endocrine disruptors, and heavy metals. The challenge for analytical chemists is that these compounds exist at concentrations far below the detection limits

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Vacuum gauge monitoring rapid pressure changes in process chamber

How Vacuum Gauge Response Time Affects Process Stability

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In vacuum-based processes such as physical vapor deposition (PVD), reactive-ion etching, and vacuum heat treatment, pressure stability directly determines film uniformity, etch rate repeatability, and part quality. Even brief pressure excursions can produce defects that scrap expensive substrates or require costly rework. The vacuum gauge is the primary process variable sensor feeding the PID control

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