Sampling schedule

Results of the leaching experiments at 25°C are more difficult to interpret. Basalt ground water is not the most effective leaching agent nor is shale the least effective. It appears that at the lower temperature fluoride plays a minor role and other, less obvious, factors predominate. Some of the differences could result from kinetic effects. This is a continuing study with further sampling scheduled at still longer time periods, so it is possible that later results will help clarify the 25°C data. 

B. Van de Wijdeven, J. Lakeman, J. Klaessens, B. Vandeginste and G. Kateman, Digital simulation as an aid to sample scheduling in a routine laboratory for liquid chromatography. Anal. Chim. Acta, 184 (1986) 151-164. 

Each commodity required a specifically customized workbook, containing a worksheet for each analyte determined in the commodity. Each laboratory received electronic copies of either three or four workbooks, which served as templates for the three or four commodities assigned to the laboratory. Each set of up to 10 commodity samples scheduled for colleetion and analysis required the creation of a copy of the appropriate template. Each workbook template contained one primary worksheet for each analyte, in which analytical data were recorded and residue levels were calculated, as described below. Eor example, the template for green beans contained 17 primary worksheets, one for each of the 17 analytes determined in each green bean sample. Additional worksheets were inserted into copies of the template as needed, to describe results of further analyses, such as confirmation of analytes present above the limit of quantitation (LOQ) or dilutions to bring the concentration of the analyte into the calibration range. 

Coordinating with analytical laboratories, including sample scheduling, sample bottle acquisition reporting, chain-of-custody records, and procurement of close support laboratories or other in-field analytical capabilities... 

Simulations were performed as follows for at least 90% of the process to be complete, observation periods of 8, 4, and 2 hr were used for c = 0.5, 1, and 3, respectively. The simulated sampling schedule had nine sampling points that varied according to the c value ... 

The input to receptor models is obtained from ambient sampling, source sampling, and sample analysis. The design of the experiment is important to obtain the most information for least cost. Sampling schedule, sample duration and particle sizing are part of the ambient sampling design. 

Future development efforts in field study design and data management should 1) develop methodologies for choosing sampler location, sampling schedule, and sampling devices 2) measure the collection efficiency of available samplers as a function of particle size, windspeed and wind direction 3) create a series of "typical" design scenarios which can be specified for different aerosol study objectives 4) develop standardized data bases from which ambient and source information can be recovered. 

A sampling schedule was designed which would encounter peak levels of ambient elemental carbon. Peak levels were of interest for two reasons to insure that filter loadings would be within the appropriate range for maximum analytical sensitivity and to expand the range of values over which the Km samplers could be calibrated. To determine when peak elemental carbon concentrations would be likely to occur, historical data on carbon monoxide... 

Don t fall into the cram trap. Take control of your preparation time by mapping out a study schedule. There are four sample schedules on the following pages, based on the amount of time you have before the exam. If you are the kind of person who needs deadlines and assign-... 

Follow up the sampling schedule according to instruction of microbiology officer. 

Travel and Equipment Transportation. Make travel arrangements that allow adequate time to accomodate unexpected events and allow for the unhurried setup of equipment at the survey site. The effects of jet lag become important when several time zones must be crossed and an intensive sampling schedule is planned. Avoid close connections between flights, especially when journeying to the survey site, since the equipment and luggage may... 

The sampling schedule was chosen in order to accumulate early data rapidly since we expected the largest changes in the leach rate at the beginning of the experiment. Also, when plotted on log paper, this sequence maintained approximately equal time separation between data points. 

Sampling Schedule Adequate sampling should be performed, for example at 1, 2, and 4 hours, and every two hours thereafter until either 80% of the drug is released or an asymptote is reached. 

This, however, requires that effluent samples be gathered over a long period. Such sampling schedules are difficult to set up since short circuiting or severe mixing can cause both... 

An example of a suggested sampling schedule for a period of 30 days and a total of 15 samples is shown in Table D3.4.1. 

Withdraw sample from the upper and lower ports of the sample container in intervals specified in the sampling schedule using an appropriately sized syringe and needle. 

Measure droplet size distribution (unit D3.3) and droplet concentration (see Support Protocol). Record results on sampling schedule and recording form (Table D3.4.1). 

Table D3.4.1 Typical Example of a Sampling Schedule and Reporting Form for Storage Stability Tests...

Automated software algorithms such as Waters MetaboLynx Application-Manager detects putative biotransformations for expected and unexpected putative metabolites (Nassar and Adams, 2003 Mortishire-Smith et al., 2005). The Application-Manager automatically runs samples scheduled for analysis by LC-MS and processes the resulting data (Fig. 4.12). Results are reported via a data browser that enables the chromatographic and mass spectrometric evidence that supports each automated metabolic assignment. 

A sample scheduling module that automatically logs in the sample, prints bar-coded labels and assigns analyses for routine projects. 

Two leach test procedures were used a modified IAEA dynamic leach test and a static leach test. In the former test the leachant was gently agitated on a mechanical shaker and was changed at selected intervals. A typical sampling schedule was three times daily for the first week, twice per day for week 2, once per day for weeks 3 through 5, and once per week through week 9. 

Inform the laboratory of upcoming sampling events and changes in the sampling schedule. 

Conduct a project kick-off meeting with the laboratory and project staff to clarify the sampling schedule and analytical requirements. 

Sampling schedule (Chapter 7), maps, and writing material. 

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