Time interval during which vertical blanking is applied. E. g. , in 625 line systems the Vertical Blanking width is 25 lines plus Horizontal Blanking Interval.
a blank sample that is placed in a sample bottle at the field site, and is handled the same as a normal sample
an unexposed control filter meant to account for background interferences and systematic contamination in the field, spurious effects due to manufacturing and storage of the filter, and systematic analytical errors
a sample of analyte-free water transferred at the sampling site into an appropriate container with appropriate added preservative(s)
a blank solution that is subjected to all aspects of sample collection, field processing, preservation, transportation, and laboratory handling as an environmental sample.
A QA/QC sample used to indicate potential contamination from ambient air and sampling instruments.