Abstract: A flame photometric detector comprises a burner assembly configured to combust a sample of an effluent, the combusted sample emitting at least one excited molecule, an interchangeable selective optical filter configured to pass a plurality of selected optical wavelengths corresponding to the excited molecule, and a photomultiplier tube configured to quantify the concentration of the excited molecule.

Abstract: Devices and methods are provided. Embodiments include devices for sealing an opening of a container, where such container sealing devices may include a flexible sealing element dimensioned to cover the opening of a container, a compliant channel in the flexible sealing element, and a compression member for maintaining the compliant channel in a sealed configuration, regardless of whether a fluid transfer member is present in the compliant channel. Also provided are containers sealed by the subject sealing devices, and methods of using the same.