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Acrolein, Acrylontrile, Styrene, and Vinyl Chloride; Acid Reactive Compounds or Not?
Oral Presentation
Prepared by S. Zeiner1, D. Blye2, L. Holman3, K. Rinehimer4
1 - Environmental Standards, Inc., 1140 Valley Forge Road, Valley Forge, PA, 19482
3 - URS Corporation, 4051 Ogletown Road, Suite 300, Newark, DE, 19703
4 - URS Corportation, 4051 Ogletown Road, Suite 300, Newark, DE, 19713
Contact Information: szeiner@envstd.com; 610-935-5577
ABSTRACT
The Environmental Protection Agency (EPA) has indicated that vinyl chloride and styrene should not be preserved to pH less than 2 [SW-846 Chapter 2 Table 2-40(A) and Chapter 4 Table 4-1]. The EPA also indicates that acrolein and acrylonitrile need to be preserved to a pH between 4 and 5 [SW-846 Chapter 2 Table 2-40(A) and Chapter 4 Table 4-1 and Federal Register Volume 77, Number 97 (EPA-HQ-OW-2010-0192)]. The EPA indicates that these analytes should be analyzed within 7 days of collection; 3 days for acrolein and acrylonitrile if not pH preserved.
It is difficult and burdensome to preserve samples in the field to a narrow pH range. In addition, it is costly to collect and analyze separate sample aliquots for acrolein, acrylontrile, styrene, and vinyl chloride. The analysis cost is also impacted by the 7 or 3 day holding time from collection to analysis.
A limited study was designed and executed to investigate if the acrolein and acrylonitrile pH preservation is necessary, if styrene and vinyl chloride are impacted by acid preservation, and if the 7 or 3 day holding time is accurate. The study included deionized water and groundwater samples that were spiked with acrolein, acrylontrile, styrene, and vinyl chloride. To evaluate the chemical preservation, half of the samples were only temperature preserved (≤6⁰C) and half of the samples were preserved to pH<2 with hydrochloric acid. Three preserved and three unpreserved samples were analyzed every other day for 16 days.
This presentation will provide the details of the study design, findings, and conclusions as to the stability of acrolein, acrylontrile, styrene, and vinyl chloride in an acidic environment (pH<2) and just how long these compounds appear to be stable in water.
Oral Presentation
Prepared by S. Zeiner1, D. Blye2, L. Holman3, K. Rinehimer4
1 - Environmental Standards, Inc., 1140 Valley Forge Road, Valley Forge, PA, 19482
3 - URS Corporation, 4051 Ogletown Road, Suite 300, Newark, DE, 19703
4 - URS Corportation, 4051 Ogletown Road, Suite 300, Newark, DE, 19713
Contact Information: szeiner@envstd.com; 610-935-5577
ABSTRACT
The Environmental Protection Agency (EPA) has indicated that vinyl chloride and styrene should not be preserved to pH less than 2 [SW-846 Chapter 2 Table 2-40(A) and Chapter 4 Table 4-1]. The EPA also indicates that acrolein and acrylonitrile need to be preserved to a pH between 4 and 5 [SW-846 Chapter 2 Table 2-40(A) and Chapter 4 Table 4-1 and Federal Register Volume 77, Number 97 (EPA-HQ-OW-2010-0192)]. The EPA indicates that these analytes should be analyzed within 7 days of collection; 3 days for acrolein and acrylonitrile if not pH preserved.
It is difficult and burdensome to preserve samples in the field to a narrow pH range. In addition, it is costly to collect and analyze separate sample aliquots for acrolein, acrylontrile, styrene, and vinyl chloride. The analysis cost is also impacted by the 7 or 3 day holding time from collection to analysis.
A limited study was designed and executed to investigate if the acrolein and acrylonitrile pH preservation is necessary, if styrene and vinyl chloride are impacted by acid preservation, and if the 7 or 3 day holding time is accurate. The study included deionized water and groundwater samples that were spiked with acrolein, acrylontrile, styrene, and vinyl chloride. To evaluate the chemical preservation, half of the samples were only temperature preserved (≤6⁰C) and half of the samples were preserved to pH<2 with hydrochloric acid. Three preserved and three unpreserved samples were analyzed every other day for 16 days.
This presentation will provide the details of the study design, findings, and conclusions as to the stability of acrolein, acrylontrile, styrene, and vinyl chloride in an acidic environment (pH<2) and just how long these compounds appear to be stable in water.