Objectives of sampling

If the objective of sampling is to provide information for warnings (threshold monitoring) autocorrelated processes can be modelled by the earlier described methods. Not only interpolation is possible but extrapolation can be applied as well. However, the uncertainty in the extrapolated estimate depends on the prediction time. As long as the predicted value, including the prediction error does not exceed the preset warning threshold, no new sample is required. Miiskens derived that the next sample should be taken at a time x after an analytical result x, according to ... 

The objectives of sampling are broadly divided into exploratory (surveillance) or monitoring (assessment) goals. Preliminary information about the site of material being analysed is provided by exploratory sampling. Monitoring is usually intended to provide information on the variation in concentration of specific analytes over a particular period of time or within a specific geographic area. 

Methods of sample preparation depend on the type of target compounds and the type of analysis to be performed. Because the chemicals related to the CWC include a large variety of organic compounds, OPCW sample preparation procedures are generic using solid-liquid and liquid-liquid extraction. The objective of sample preparation is to... 

Sample Preparation. Sample preparation is an important but often overlooked part of biomass analysis. Biomass sample preparation must take several factors into account. The object of sample preparation is to enable the analysis to be done on a small scale while ensuring that the analysis of the small sample provides valid information about the larger bulk sample. Typically, biomass sample preparation includes drying, milling, sieving, and homogenizing. 

A second objective of sampling at the Anvil Points mine was to obtain a representative sample of a full 60-foot interval. The zone selected was from 20 feet above the Mahogany marker to 40 feet below. This procedure gave us samples of shale from beds G and H, which show a highly cylical grade change with depth in the core analysis histograms. 

The sample sites were chosen with the objective of sampling large and well-mixed air masses influenced only by long-range transport. 

In many respects, the sampling and preparation of a sample are critical steps in any technique of food analysis. The objective of sampling is to ensure that the sample taken for analysis is representative of a defined whole, and the method of sampling depends on the size and nature of the defined whole. 

The object of sample preparation in inorganic analysis is to meet the requirements for a substantially trouble-free determination of the analyte. The most important of these with respect to trace analysis in any matrix include ... 

The main objectives of sample preparation are as follows 1. Matrix modification in order to ... 

The objective of sampling is to obtain a test specimen that is representative of the entire quantity. Thus, take lab samples in accordance with the instructions in Practice D40S7. The specific sampling technique can affect the accuracy of this test method. 

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