Case Study: Bisphenol-A (BPA) Testing and Analysis

PROBLEM: A consumer product supplier needed to determine if Bisphenol-A (BPA) was present in their final products: polymer containers, lids and storage bags.

SOLUTION: Impact Analytical performed BPA analysis of the polymer materials to determine if BPA was present down to the part per billion (ppb) level.

TECHNIQUES: Gas Chromatography Mass Spectrometry (GC-MS)

A consumer product supplier contacted Impact Analytical’s BPA testing lab to determine if BPA was present in their final product.   For quality assurance purposes, they needed an independent lab to perform the analysis.  BPA has been found to cause adverse reproductive affects at concentrations as low as 0.5 parts per billion (ppb), thus the customer wanted to perform due diligence in ensuring their products were BPA free.  Impact Analytical employed a product specific method for BPA testing using GC-MS to determine if any is present in the low ppb range.

Containers, lids and storage bags were analyzed using an Impact Analytical product specific GC-MS method.  GC-MS analysis is an excellent technique for separating and identifying Bisphenol-A compounds in any sample matrix and was the method of choice for the polymer samples.  Each sample was cut, ground, and extracted for BPA.  The extracts were analyzed by GC-MS using selected ion monitoring (SIM) made for maximum sensitivity for the detection of BPA.  No BPA was detected in any of the samples, except for one, down to a detection limit of 7.5 ppb.  

For the lid sample containing a BPA peak in the chromatogram, an external BPA standard was used to prepare a 4-point calibration curve for accurate quantitation of BPA.  

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