Epoch Analytical is pleased to now offer lead analysis of paints and coatings using a Flame Atomic Absorption Spectrometer. FAA analyzes lead content according to modified EPA 7000B and test method NIOSH 7082.

Using Flame AA Spectroscopy, a small quantity of sample is homogenized and microwave digested using nitric acid. The lead concentration sample is accurately determined in PPM (parts per million) using the reading from the Flame AA spectrometer following microwave digestion and dilution of a small quantity of the original sample. Please submit a sample that is no smaller than 2″x 2″ size or a minimum 100 grams in weight.

The technique is based on the principle that ground state metals absorb light at a specific wavelength. Metal ions in a solution are converted to atomic state by means of a flame. The main advantages of Flame AA include the output of highly reliable analytical results while maintaining a fast turnaround time.

To quantitatively determine the lead (Pb) content in paint and coatings, NIOSH 7082 is used. Paints chips are decomposed using mineral acids, and prepare appropriate dilutions. and measure these paint samples by aspirating them into an air-acetylene flame for atomic absorption measurement using NIOSH 7082.

Flame analysis is suitable for most analytes and matrices including paint, wipes, soils and air samples and results are reported in PPM or %. For ceramic tiles, the glazing or surface coating of the tile is analyzed for lead content using XRF Analysis.

The Limit of Detection (LOD): approx. 40 ppm or 40 mg/kg based on a 0.25g sample weight. Please submit a sample that is no smaller than 2″x 2″ in size or minimum 100 grams in weight.

Epoch Analytical Inc is a participant member of the AIHA Proficiency Analytical Testing Program , ELPAT #289207.

Blown Insulation

Brick Mortar

Ceiling-Tile

Drywall Joint Compound

Linoleum or Vinylsheet

Paper Tape

Plaster

Exterior Stucco

Texture Coat

Vermiculite & Blown Insulation

Window Putty

Vinyl Floor Tile

Bulk Asbestos Identification using Polarized Light Microscopy (PLM) in accordance to EPA/600/R-93/116 and EPA600/M4-82-020.

Examination of samples for asbestos content was conducted in accordance to EPA/600/R-93/116 and EPA/600/M4-82-020 methodologies using polarized light microscopy (PLM). This method is the most widely used for estimating asbestos in bulk building materials and works well for most sample types.

Multiple layers of samples are analyzed and reported separately. All analysts are derived from calibrated visual estimate and measured in weight percent unless otherwise noted. Please note that the EPA600 test method has a limitation for quantifying the percentage of samples with <1% asbestos concentration as its Limit of Detection is 1%.

Transmission Electron Microscopy (TEM) would be encouraged for customers to obtain accurate results in these situations.

Using Stereoscopic Evaluation

All samples are analyzed first through stereo binocular examination. By magnifying a bulk sample at up to 40x, the analyst is able to evaluate and extract suspicious fibres that possess the morphological characteristics of asbestos. From there, fibres are mounted on a slide with a refractive index oil and then analyzed with the Polarized Light Microscope (PLM).

Using Polarized Light Microscopy (PLM)

Polarized light microscopy (PLM) analysis is the most commonly accepted technique for analysing bulk samples for asbestos. Identification of asbestos is based on the determination of optical properties displayed when the sample is treated with various dispersion staining liquids. Identification is further substantiated by fibre morphology and the effect of polarized light on the fibres. PLM analysis is specific to fibrous materials and allows for the determination of:

Asbestos Type: There are six (6) types (Chrysotile, Amosite, Actinolite, Tremolite, Crocidolite Anthophylite);
Quantification: % amount of asbestos and non-asbestos fibers in the sample quantified by Calibrated Visual Estimate of the analyst;
Fiber Colour under microscopic evaluation;
None Detected : Means No Asbestos Present in sample

In testing for asbestos, air is drawn through a filter. This filter is usually a part of a 25-mm cassette that can take specific sampling times. The sampling time is chosen to produce a fiber density of between 100 to 1,300 fibers/mm2; this rate is usually 0.5 to 16.0 liters/minute. The filter is then analyzed by phase contrast microscopy (PCM) or transmission electron microscopy (TEM). Fibre counting analysis is conducted in accordance to The National Institute for Occupational Safety and Health (NIOSH) Method 7400.

The National Institute of Occupational Safety and Health (NIOSH) method 7400

The analysis includes testing of air sample for asbestos and other fibers by PCM. It is used primarily for estimating asbestos concentrations in air. The method does not differentiate between asbestos and other fibers and can also be used to estimate the airborne concentration of other, non-asbestos materials such as fibrous glass. Fibre less than 0.25 microns in diameter will not be detected with this method.

The National Institute of Occupational Safety and Health (NIOSH) method 7402

NIOSH 7402 is fibre specific and can be utilized to complement the phase contrast microscopy method 7400. It can determine the fraction of asbestos fibres among all optically visible fibres within a given sample. The results can be used to calculate a modified PCM fibre count.

PCM works well for testing airborne fibers because it is relatively inexpensive and quick. However, PCM does not differentiate between asbestos and other fibers. All fibers that meet the counting criteria are counted. Transmission Electron Microscopy (TEM) is encouraged for customers to obtain more accurate results where precise determination of airborne asbestos fiber is needed.

Gravimetric point counting is a technique that enhances quantification of asbestos in bulk building materials.The sample is first dried and then weighed. It is then subjected to high temperature in an ashing furnace for a period of approximately 6 hours. During this process organic material is oxidized (burned). After cooling the sample is re-weighed and the weight loss recorded.

Further treatment with diluted hydrochloric acid may be used to remove carbonates and other acid soluble substances in the sample. The remaining material is then washed with plain water, dried and weighed. This weight loss is also recorded. The residue is now examined and PLM point counting is performed to determine the concentration of asbestos fibers in the residue. Because we know the weight of the residue we can calculate the concentration of asbestos in the original sample.

Gravimetric point count improves the ability to detect asbestos fibers in the sample and also improves the quantification. This is so because the residue is very often granular particulates rather than a wide variety of materials with vastly different density and mass thereby making more representative slides and improving point counting statistics.

Point counting does not apply to the EPA vermiculite method.

The Asbestos 400 Point Count reporting limit is <0.25% and Asbestos 1000 Point Count reporting limit is <0.1%.

Vermiculite is a mineral which was commonly used as insulation in buildings, amongst other commercial and consumer products. While not all vermiculite may contain asbestos fibers, it is reasonable to assume that older vermiculite insulation should be analyzed by an accredited asbestos laboratory. WorkSafeBC recommends that the Vermiculite Research Method, EPA/600/R04-004, otherwise known as the “Cincinnati Method”, be utilized. Regular analysis by Polarized Light Microscopy (PLM) using EPA/600/R93/116 may not be adequate to detect asbestos amphiboles from an insufficient sample size to determine the presence or absence of asbestos, the Cincinnati Method is more precise and accurate due to a two-step extraction process using water to separate the amphibole asbestos fibers.

If NO asbestos amphiboles are detected in the fractions, Transmission Electron Microscope (TEM) is the final step of analysis to confirm the presence or absence of asbestos. Any % amount of asbestos detected in vermiculite, is considered an Asbestos Containing Materials (ACM) according to WorkSafeBC. Please submit at least 4 gallons or a full 6″x7″ zip lock large freezer bag of vermiculite for analysis – an insufficient quantity of vermiculite may be rejected and will delay analysis.

EPOCH uses Open Beam X-Ray Fluorescence (XRF) technology to conduct our lead testing methods as a fast (immediate), non-destructive technique of testing for lead in surface paints and coatings. The XRF analyzer measures the amount of lead in paint and other surface coating by exposing a painted or coated surface to X-rays or gamma radiation, which then causes any lead present to emit energy with a certain frequency.

The results from XRF analysis can be reported in either volume as ppm (parts per million) or surface area as mg/cm2. Please submit a bulk sample of paint that is at least 2-3 inches in surface area. Lead surface wipes can also be analyzed by XRF. Please be sure to

The limit of detection (LOD) using XRF for volume is approximately < 20 ppm or mg/kg.

Our technicians are certified XRF analyzer operators and have acquired a Level 1 X-ray Fluorescence Analyzer Operator Certificate issued by the National NDT Certification Body, Natural Resources Canada (Canmet Materials, NRCan).

Epoch Analytical is pleased to now offer lead analysis of paints and coatings using a Flame Atomic Absorption Spectrometer. FAA analyzes lead content according to modified EPA 7000B and test method NIOSH 7082.

Using Flame AA Spectroscopy, a small quantity of sample is homogenized and microwave digested using nitric acid. The lead concentration sample is accurately determined in PPM (parts per million) using the reading from the Flame AA spectrometer following microwave digestion and dilution of a small quantity of the original sample. Please submit a sample that is no smaller than 2″x 2″ size or a minimum 100 grams in weight.

The technique is based on the principle that ground state metals absorb light at a specific wavelength. Metal ions in a solution are converted to atomic state by means of a flame. The main advantages of Flame AA include the output of highly reliable analytical results while maintaining a fast turnaround time.

To quantitatively determine the lead (Pb) content in paint and coatings, NIOSH 7082 is used. Paints chips are decomposed using mineral acids, and prepare appropriate dilutions. and measure these paint samples by aspirating them into an air-acetylene flame for atomic absorption measurement using NIOSH 7082.

Flame analysis is suitable for most analytes and matrices including paint, wipes, soils and air samples and results are reported in PPM or %. For ceramic tiles, the glazing or surface coating of the tile is analyzed for lead content using XRF Analysis.

The Limit of Detection (LOD): approx. 40 ppm or 40 mg/kg based on a 0.25g sample weight. Please submit a sample that is no smaller than 2″x 2″ in size or minimum 100 grams in weight.

Epoch Analytical Inc is a participant member of the AIHA Proficiency Analytical Testing Program , ELPAT #289207.

Accurate identification of molds is important. It helps alleviate unnecessary concern and aids in decision-making.
Suitable samples for mold testing include:

• Bulk samples: Pieces of material with signs of mold.
• Tape lift or swab samples taken from surfaces suspected of mold.
• Air samples: These include non-viable and viable samples.

Mold testing involves analysis of samples collected from residential and commercial properties. Samples for mold testing include air for either viable or non-viable analysis and surface samples such as swabs, bulk (pieces of material, dust or liquids), tape lift, and contact plates.

Direct Microscopic Examination (DME) is using x100, x400, or x1000 magnification as necessary.
Culture and spore quantification is also available. Mold Analysis and Bacteria analysis is conducted by a trained microbiologist.

Epoch Analytical Inc is a participant member of the AIHA Proficiency Analytical Testing Program , EMPAT #289207.