Solid-phase extraction has several advantages over liquid/liquid extraction for extractables and leachables studies. An extractable/leachable (E/L) study is routinely performed on the materials ...

There are two ways in which 'difficult' samples are usually categorized: either by the problems posed by the physical nature of the post-vivo sample matrix containing the chemical entity to be ...

Robust per- and polyfluoroalkyl substances (PFAS) analysis is essential for ensuring food safety and consumer health. However, PFAS analysis in complex environmental matrices can require long ...

We study sample covariance matrices of the form $W=(1/n)CC^{\intercal}$, where C is a k × n matrix with independent and identically distributed (i.i.d.) mean 0 ...

We consider a p-dimensional time series where the dimension p increases with the sample size n. The resulting data matrix X follows a stochastic volatility model: each entry consists of a positive ...

Each effect has n a-1 degrees of freedom, assuming a complete combination. Thus, for the example, each effect has two degrees of freedom. The procedure compares nested values to data values on the ...