For 20 urine samples, two 5-mL aliquots
were apportioned and acidified to pH 3.
5] was added to each aliquot
, and the aliquots
were then processed as described above for positive-ion measurement.
The three aliquots
were processed immediately, after a 3-h delay, or after a 6-h delay.
In a second method comparison, 40 samples were split into two aliquots
with one aliquot
being analyzed by our LC-MS/MS method (y) and the other aliquot
analyzed by the HPLC-EC method (x).
of the cryoprotectant medium was added to the specimen and gently mixed for 5 min.
Two salt-to-metal catalyst ratios in the digestion mixture (10:1 and 20:1) and three amounts of digestion mixture per aliquot
5, and 1%) were separately added to five of the aliquots
, and one aliquot
was assigned as the negative control.
A 200[micro]l aliquot
of the culture medium was assayed for MDA according to the lipid peroxidation assay kit protocol.
Novilytic's Noviplex Plasma Collection Card is a self-contained, blood-plasma sampling device used to volumetrically collect a plasma aliquot
independent of whole blood application volumes.
A fast system for high-volume laboratories with a throughput of up to 2,400 tests per hour, the ADVIA Chemistry XPT System achieves predictable turnaround times through a combination of micro-volume technology and aliquot
) was diluted with 180 [micro]L of phosphate-buffered saline (PBS) and the other (G aliquot
) was diluted with 180 [micro]L of 1M guanidine solution (G) (Sigma-Aldrich).
However, after transferring the plasma to aliquot
tubes and recentrifugation, hCG decreased by an average of 93% in the 11 previously increased samples, all to [less than or equal to] 10 mIU/mL (Table 1).
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An adjustable aliquot
of that mixture is added to a constant dilution flow in the SD module.
25 [micro]L of PBS was added to the other aliquot