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 ...

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 ...

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 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 ...