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WOHL: Sample Analysis: Inorganic Analysis

 

Hexavalent chromium

WOHL performs analysis for hexavalent chromium, Cr(VI), chromic acid, chromium trioxide, chromate compounds, and dichromate compounds, in air, based on OSHA ID-215 (ion chromatography with post column reaction and visible detection). There are 4 basic types of samples which can contain Cr(VI):  welding related samples, paint related samples, plating or acidic environment related samples, and other Cr(VI) related dusts.

Welding samples are collected on un-weighed 5 micron PVC.  We can provide two types of filters for this: 37 mm with clear band labeled Na/K/Cr6 (WOHL media #86) and 25 mm with clear band labeled Cr6 weld (WOHL media #161) for behind welding helmets.  After collection, samples need to be sent back to lab ASAP, as according to the method they are not stable past 8 days.

Paint related samples can be collected on either the 37 mm or the 25 mm clear banded filters listed above.  Sample submission forms need to clearly indicate they are paint related samples as they require a second digestion and second analysis

Plating or samples from acidic environments are collected on  NaOH treated quartz fiber filters with a clear band and labeled Cr6 acid.  Once these samples are collected they on these filters, they are stable.

Acids/ Ion chromatography Analysis

WOHL performs a wide range of IC analysis including analysis of mineral acids, organic acids, ammonia, sulfur dioxide, hydrogen sulfide, low molecular weight amines, ethanolamines, cyanide, hexavalent chromium, azide/hydrazoic acid, chlorine/bromine, oxalic acid, chlorine dioxide, and oxides of nitrogen (NO2 and NO).  Refer for online sampling guide for media and sampling protocols.

Weights/Gravimetric Analysis

WOHL performs respirable and total dust analysis using NIOSH 0500 and 0600 methods. We also have available sampling media for inhalable dust. WOHL has a limited quantity of cyclones and pumps that customers may use for sampling. Media for sampling is included at no cost for most types of samples.  (Link to special details on gravimetric analysis from IAC).