COMPOSITE SAMPLING TECHNIQUES FOR DETERMINING PESTICIDE CONCENTRATIONS

Evaluating Composite Sampling Methods of Bacillus Spores at Low Concentrations

Restoring all facility operations after the 2001 Amerithrax attacks took years to complete, highlighting the need to reduce remediation time. Some of the most time intensive tasks were environmental sampling and sample analyses. Composite sampling allows disparate samples to be combined, with only a single analysis needed, making it a promising method to reduce response times. We developed a st...

Comparison of Wet Wipe vs Micro-Vacuum Sampling Techniques for Determining Concentrations of Asbestos in Surface Dust

The objective of the study was to evaluate the detection efficiency of micro-vacuum surface sampling and surface wet wipe sampling in homes that had been identified with vermiculite attic insulation and/or other asbestos containing materials. Surface samples were collected pre and post weatherization activities and analyzed by transmission electron microscopy. Baseline sampling revealed that we...

Nail Sampling techniques for Diagnosing of onychomycosis-Section 10

The clinical suspicion of onychomycosis based on appearance of the nails, requires fungal culture for confirmation. The unfamiliar terminologies used in reporting culture results leads to misinterpretation and hamper treatment decision. Accurate laboratory diagnosis of onychomycosis depends on the quality of sample collection, and reporting by microbiologist. Site selection for sampling depends...

Composite sampling

Composite Estimators for Complex Sampling

Interest in on-line surveys aroused in the middle of the nineties, that is since questionnaires in HTML were first drawn up. The main questions that statisticians should always formulate when they plan an on-line survey are the following: which are the kinds of investigations we can carry out; which are the target finite population and the sample space, the inclusion probabilities and the pecul...