The concentration of the arsenic was determined experimentally by analyzing six determinations of two replicates (three each).
Recoveries (%R) were determined by comparing the absolute response of the melatonin standard spiked in control samples, using 30 determinations (three concentrations/ten replicates each).
Data are expressed as n = number of determinations (three per independent experiment).
To improve sensitivity of CAP determination, two kinds of immunomagnetic separation methods were designed and compared.
In the case of critical impeller speed determination, two liquid viscosities have been used.
The IHC has recommended three main methods for HMF determination: two spectrophotometric methods by White and Winkler and a reversed-phase high-performance liquid chromatography (HPLC) method [191].
For chloride determination two micro-pumps were employed to impel the solutions, while for chromium determination this task was performed by a conventional peristaltic pump.
Based on the theory of dynamic orbit determination, two different station distributions were analyzed to study their impact on BDS precise and real-time orbit determination.
To guarantee the reproducibility of mRNA determination, two independent total RNA extractions were performed.
For ankle-circumference determination, two perpendicular diameters of the joint were measured with a caliper (Lange Caliper; Cambridge Scientific Industries, Cambridge, MA, USA).
