Environmental Laboratory Equipment

Gas Chromatography / Mass Spectroscopy

Agilent 6890/5975 GC/MS System

Agilent 7890 GC System

Gas Chromatography Mass Spectrometry (GC/MS) and Gas Chromatography (GC) are techniques for the analysis and quantitation of volatile and semi-volatile organic compounds in water, wastewater, sludge, or soil samples. GC/MS is a powerful analytical technique that combines two techniques into a single analysis to allow both qualitative and quantitative separation and environmental contaminants identification. We rely on both the NIST library and our own internal library for the GC/MS identification of the contaminant compounds. Truesdail uses gas chromatography with either a flame ionization detection (FID) or an electron capture detector (ECD).

For the analysis of volatile and semivolatile organic compounds such as those listed in the US EPA Methods 552, 524, 625, 624, 608, 8015, 8270, and 8260 Truesdail uses both GC/MS and GC techniques. For the determination of volatile organic compounds (VOCs) including BTEX, Truesdail utilizes purge and trap/gas chromatography mass spectrometry (P&T/GC/MS). The gas chromatography technique is very sensitive technique to quantitate either halogen containing target compounds (PAHs) or petroleum compounds found in diesel and gasoline.

High Performance Liquid Chromatography

Agilent 1200 Series HPLC System

Liquid Chromatography is an analytical technique to separate molecules form each other in the liquid phase. HPLC offers several advantages with column separation efficiency, sensitivity and selectivity for certain compounds where the components being determined are at the parts per million level or less. Truesdail uses HPLC analysis for the determination of hydrazine, formaldehyde, bisphenol A compounds and other organic molecules.

Inductively Coupled Plasma – Mass Spectrometry

Agilent 7700 Series – ICP/MS

Inductively coupled plasma mass spectrometry (ICP-MS) is an analytical technique to quantitate metals at very low concentrations, as low as one part in trillion (10-12). ICP-MS works by ionizing a sample with the plasma and then using the mass spectrometer to identify and quantitate the metal ions. In the Environmental laboratory ICP/MS is used to preform trace and ultra-trace analysis of heavy and toxic metals in drinking water, wastewater, sludge, and soil samples. Truesdail specializes in metals analysis and has expertise in hazardous characterization of metals using EPA method 200.8 for potable water analysis, including Title 21 and Title 22 analysis.

Inductively Coupled Plasma Optical Emission Spectroscopy

Thermo 6300 Series – iCAP 6300 Duo View ICP-OES

Inductively coupled plasma optical emission spectroscopy (ICP/OES) is regarded as one of the most popular techniques for metals analysis in a variety of different matrices from the percent concentration to the parts per million or parts per billion range. The digested sample is atomized into the inductively coupled plasma at approximately 10,000°C to ionize the sample. The ionized sample emits photons based on the elements present in the sample. Truesdail uses EPA Method 200.7 which includes TTLC, STLC, TCLP, and CAM 17 metals analysis.

Ion Chromatography

Dionex DX 600 Series Chromatography Systems

Ion Chromatography (IC) is a robust, versatile, and powerful technique for the analysis of a large number of ions present in environmental water samples. IC measures the concentration of ions by separating them based on their affinity with an ion-exchange resin. Truesdail has IC systems that use both absorbance and electrochemical detectors. Method detection limits (MDLs) for anions are typically in the low parts per billion range with very linear calibration curves. Ion chromatography is a well-established regulatory method for water analysis to measure concentrations of major anions, such as chloride, fluoride, nitrate, nitrite, and sulfate as well as hexavalent chromium.

Biochemical Oxygen Demand Analysis

Biochemical Oxygen Demand (BOD) is a measure of the amount of dissolved oxygen required by microorganisms to break down organic matter ‘food’ present in a wastewater sample. The analysis is run at 20°C over a five day period and represents the ‘oxygen demand’ from respiration of the aerobic microorganisms to consume all organic waste ‘food’ in the sample. BOD provides information for waste loads to treatment plants, determine production process control, and to determine the effects of discharges on receiving waters. BOD provides information on the biologically convertible portion of the organic content in the wastewater sample. Truesdail uses an automated BOD system designed for the 5 day analysis to conform to the regulatory requirements of Standard Methods 5210B.