Research performed on the original stainless steel En Core Sampler by the Wisconsin DNR and EPA Region V demonstrated that the Sampler is effective for storage of soil for up to 48 hours. Recoveries during this time period were statistically the same as with immediate methanol preservation, indicating little volatilization or biodegradation over the same length of time using the En Core method.

Later research was performed by Alan Hewitt at the Army Corps of Engineers Cold Regions Research Engineering Laboratory. Results on the current disposable En Core Sampler demonstrated that the En Core is effective for up to seven days. Recoveries were statistically the same as with immediate methanol preservation. This information is published in American Environmental Laboratory1.

Based on these results, many state agencies as well as the Environmental Protection Agency have accepted the use of the En Core Sampler as an alternative sampling technique for short term sample storage, followed by field, office or laboratory methanol preservation or other appropriate sample preparation.

For additional technical information, contact at En Novative Technologies

For more information on En Core holding times please review the following:

• Summary and Comparison of Current Soil Collection Practices
• Validation of En Core Sampler Holding Times Executive Summary For Download
• Additional Hold Time Studies for the En Core Sampler: Report for Download