USGS-NWQL: O-4434-12:  Steroid Hormones in Unfiltered Water by GC-MS/MS

  • Summary
  • Analytes
  • Revision
  • Data and Sites
Official Method Name
Determination of Steroid Hormones and Related Compounds in Unfiltered Water by Solid-Phase Extraction, Derivatization, and Gas Chromatography with Tandem Mass Spectrometry
Current Revision
2012
Media
WATER
Instrumentation
Gas Chromatography with Tandem Mass Spectrometry Detection
Method Subcategory
Organic
Method Source
  USGS-NWQL
Citation
  Foreman, W.T., Gray, J.L., ReVello, R.C., Lindley, C.E., Losche, S.A., and Barber, L.B., 2012, Determination of steroid hormones and related compounds in filtered and unfiltered water by solid-phase extraction, derivatization, and gas chromatography with tandem mass spectrometry: U.S. Geological Survey Techniques and Methods, book 5, chap. B9, 118 p.
Brief Method Summary
This analytical method developed by and implemented at the U.S. Geological Survey National Water Quality Laboratory determines a suite of 20 steroid hormones and related compounds in filtered water (using laboratory schedule 2434) and in unfiltered water (using laboratory schedule 4434). USGS report TM 5-B9 documents the procedures and initial performance data for the method and provides guidance on application of the method and considerations of data quality in relation to data interpretation. The analytical method determines 6 natural and 3 synthetic estrogen compounds, 6 natural androgens, 1 natural and 1 synthetic progestin compound, and 2 sterols: cholesterol and 3--coprostanol. These two sterols have limited biological activity but typically are abundant in wastewater effluents and serve as useful tracers. Bisphenol A, an industrial chemical used primarily to produce polycarbonate plastic and epoxy resins and that has been shown to have estrogenic activity, also is determined by the method. The samples undergo chemical derivatization with activated N-methyl-N-trimethylsilyl trifluoroacetamide (MSTFA) before GC/MS/MS analysis.
Scope and Application
This report describes the analytical method for the determination of selected steroid hormones and other compounds in unfiltered water (USGS method number O–4434–12). The report includes a brief outline of procedures to use for field collection, processing, and shipment of the water samples to the NWQL. The report also summarizes a set of validation studies, including spike recovery experiments in reagent water and three field matrices that are anticipated to be submitted frequently for analysis: a surface-water sample, a primary WWTP effluent sample, and a secondary WWTP effluent sample. This report also presents the results of a multi-concentration detection level determination, results of sample and extract holding-time experiments, and results from custom analysis of samples in a variety of aqueous matrices. Method data-reporting procedures are addressed, including those applied to laboratory and field-based quality-control (QC) and quality-assurance (QA) samples. Note: all isotope-dilution standards (IDSs) data presented in this report are absolute IDS recoveries obtained for the isotope.
Applicable Concentration Range
Interferences
Sample contamination is a concern because some of the hormone compounds are biogenic and can be present on human skin or might be used as personal-care products. Others analytes are synthetic hormone pharmaceuticals that are in common use. Avoid contamination of the samples by avoiding consumption or contact with such materials immediately before and during sample collection and processing procedures. Protective gloves (for example, nitrile gloves) must be worn at all times. Samples are easily contaminated with bisphenol A, see report for which to avoid laboratory tissue or other paper products during field or laboratory sample manipulations of these samples.
Quality Control Requirements
Collect field-submitted quality control samples. Batch sequence QC considerations. Equipment calibration. The report gives a lengthy description of several specifics.
Sample Handling
Filter sample; add 50 mg of ascorbic acid per 500 mL of water if halogenation treatment of the water is used, chill at collection site, ship at 4oC. Leave air space in 500mL sample. Use high-density polyethylene bottles/caps if no residual chlorine.
Maximum Holding Time
Varies by analyte, some analytes degrade rapidly after collection; therefore, ship immediately to the lab.
Relative Cost
Greater than $400
Sample Preparation Methods