laboratory SPE extraction workflow analyzing antibiotic residues in milk samples

SPE Workflow for Antibiotic Residue Analysis in Milk Samples

Leave a Comment / Food Safety Testing / By /

1. Common Antibiotics Monitored in Dairy Testing Dairy product safety requires rigorous monitoring of antibiotic residues, with beta-lactams and tetracyclines being the most frequently analyzed classes. Beta-lactams, including penicillins (amoxicillin, ampicillin) and cephalosporins, are widely used in veterinary medicine for treating mastitis and other infections. Tetracyclines such as oxytetracycline, tetracycline, and chlortetracycline are broad-spectrum antibiotics […]

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Vacuum pressure pump-down curve displayed during system evacuation

How to Interpret Vacuum Pump-Down Curves in Industrial Systems

Leave a Comment / Vacuum Technology Basics / By /

In industrial vacuum systems—whether vacuum heat-treatment furnaces, mass spectrometers, scanning electron microscopes, or semiconductor load locks—monitoring the pump-down curve is one of the most powerful diagnostic tools available. A well-interpreted curve reveals pump performance, chamber integrity, process gas behavior, and potential maintenance issues long before they become costly failures. Poseidon Scientific’s VG-SP205 Pirani Vacuum Transmitter

How to Interpret Vacuum Pump-Down Curves in Industrial Systems Read More »

laboratory SPE cleanup workflow for fatty food samples prior to LC-MS testing

Using SPE for Cleanup of High-Fat Food Samples Prior to LC-MS Analysis

Leave a Comment / Sample Cleanup / By /

1. Analytical Challenges in Fatty Food Matrices (Oils, Dairy, Processed Foods) High-fat food matrices present unique analytical challenges that significantly complicate LC-MS analysis. Oils, dairy products, and processed foods contain complex mixtures of lipids including triglycerides, phospholipids, cholesterol esters, and free fatty acids that can range from 5% to over 40% of the total sample

Using SPE for Cleanup of High-Fat Food Samples Prior to LC-MS Analysis Read More »

Pirani and cold cathode gauges mounted on shared vacuum manifold

Using Dual-Gauge Architecture for Wide-Range Vacuum Monitoring

Leave a Comment / Integration & Automation / By /

In vacuum systems spanning atmosphere to 10⁻⁷ Torr, no single gauge delivers accurate, continuous measurement across the entire range. Engineers therefore rely on a dual-gauge architecture that combines a rough-vacuum Pirani sensor with a high-vacuum cold-cathode ionization gauge. At Poseidon Scientific, we designed the VG-SP205 Pirani Vacuum Transmitter and the VG-SM225 Cold Cathode Vacuum Gauge

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SPE cartridge workflow removing phospholipids from plasma samples during LC-MS sample preparation

How to Remove Matrix Phospholipids in LC-MS Sample Preparation Using SPE

Leave a Comment / LC-MS Sample Preparation / By /

Why Phospholipids Cause Ion Suppression in LC-MS Analysis Phospholipids represent one of the most significant sources of matrix effects in LC-MS analysis, particularly when dealing with biological samples like plasma and serum. These amphipathic molecules contain both hydrophobic fatty acid chains and hydrophilic phosphate head groups, making them particularly problematic for mass spectrometry workflows. The

How to Remove Matrix Phospholipids in LC-MS Sample Preparation Using SPE Read More »

Pirani vacuum transmitter mounted on industrial roughing pump line

How to Extend Pirani Sensor Lifespan in Rough Vacuum Applications

Leave a Comment / Maintenance & Troubleshooting / By /

In rough vacuum applications—ranging from vacuum heat treatment furnaces and annealing systems to mass spectrometry roughing stages and scientific instrumentation—the Pirani sensor remains the go-to solution for reliable pressure measurement from atmosphere down to 10⁻³ Torr. The VG-SP205 Pirani Vacuum Transmitter, developed at Poseidon Scientific, uses a platinum filament and precision temperature-compensated circuitry to deliver

How to Extend Pirani Sensor Lifespan in Rough Vacuum Applications Read More »

Cold cathode and hot cathode vacuum gauge heads comparison

Cold Cathode vs Hot Cathode: Contamination Resistance Explained

Leave a Comment / Technical Deep Dive / By /

In high-vacuum and ultra-high-vacuum environments, ionization gauges are the workhorse for pressure measurement below 10⁻³ Torr. Yet when process gases, reactive species, or deposition byproducts are present, gauge contamination becomes a critical concern. Hot-cathode ionization gauges (HCGs) and cold-cathode ionization gauges (CCGs) both ionize gas molecules to produce a measurable current, but they differ dramatically

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SPE cartridge removing chlorophyll pigments from plant extract

SPE Method for Removing Chlorophyll from Botanical Extracts Prior to LC Analysis

Leave a Comment / Sample Cleanup / By /

Challenges Posed by Chlorophyll and Plant Pigments in Chromatographic Analysis Chlorophyll and other plant pigments present significant analytical challenges in liquid chromatography (LC) analysis of botanical extracts. These highly colored compounds can cause severe interference through several mechanisms. First, chlorophyll’s strong UV-visible absorption can mask target analyte peaks, particularly when using UV detection at wavelengths

SPE Method for Removing Chlorophyll from Botanical Extracts Prior to LC Analysis Read More »

Pirani vacuum transmitter wired to industrial PLC control panel

How Analog 0-10V Outputs Improve PLC Vacuum Integration

Leave a Comment / Integration & Automation / By /

In today’s automated vacuum systems, programmable logic controllers (PLCs) serve as the central nervous system for process monitoring and control. Whether in mass spectrometry, vacuum heat treatment, or scientific instrumentation, reliable vacuum data must reach the PLC instantly and accurately. While digital protocols offer flexibility, the analog 0-10 V output remains the most widely adopted

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laboratory optimizing SPE wash solvents during sample preparation

Optimizing SPE Wash Steps for Removal of Matrix Interference in Biological Samples

Leave a Comment / SPE Method Development / By /

1. Identification of Common Biological Matrix Interferences Biological samples present unique challenges for solid-phase extraction due to their complex composition. The primary matrix interferences that must be addressed during SPE wash optimization include: Lipids and Phospholipids Lipids represent one of the most significant sources of matrix suppression in LC-MS analysis. These hydrophobic compounds can accumulate

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