The intensity of the THP band relied on the interaction of the protein with aminotriarylmethane dye of Coomassie Brilliant blue; as dye component may vary from batch to batch, standard THP was run concurrently with the samples in each analysis.
High quality PCB determinations were ensured by use of within-batch replicates, standards across batches, and surrogate standards.
Each batch included standards, 40 samples, two blanks, two pooled urine control samples, and two pooled urine control samples spiked with standards to an added concentration of 10 ng/mL.
The current batch of standards being considered are aimed at local authorities in Wales, national park authorities and Welsh ministers.
Each batch included standards for calibration curves, around 35 unknown samples plus 2 blanks, 2 urine pool controls, and 2 urine pool controls spiked with phthalate standards in low levels.
Each batch included standards for calibration curves and approximately 35 coded samples plus 2 blanks, 2 urine pool controls, and 2 urine pool controls spiked with low levels of phthalate standards.
Each batch included standards for calibration curves, about 40 unknown samples, 2 blanks, 2 urine pool controls, and 2 urine pool controls spiked with BPA standards at low or high level, respectively.
The degradation rate is calculated from the net gas production and the theoretical gas amount for the test batch at standard temperature for 100% degradation on day i according to the equation: Degradation i = V NT,i − V NK,i V Th × 100 (6).
To estimate the uptake capacity of Cu II) under batch conditions, standard solutions of 0, 1, 5, 10, 20, 30, 40, 50, 80, 100, 150, 200, 300, 400, and 500 mgL-1 were prepared and adjusted to the optimum pH 6.0 with the buffer solution of KH2PO4/NaOH.
The mass of methylated BCAT1 and IKZF1 DNA in each plasma specimen was determined from the batch specific standard curve.
