ممنون میشم اگه راهنمایی کنید
use common sense in reporting when to choose mg/L, or mg/kg or even if the concentration is high.
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mg/L as CaCo3 for water hardness, acidity, and alkalinity
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such chemicals receive intense scrutiny and analytical protocols are always available.
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Extractability: Extraction with methylene chloride initially under basic conditions to isolate the base/neutral fraction(B/N) and then acid condition to obtain the acidic fraction (mostly phenolic compounds)
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RSD is used for the evaluation of multiple replicate measurements, whereas RPD is used for measuring percision between two duplicate measurements.
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high level soil/ sludge by sonication
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the calibration curve is a plot of instrumental response (absorbance, electrical signal, peak area,etc) vs. the concentration of thr chemicals of interest
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it is always a good laboratory practice to run the calibration curve along with samples in the same batch, particularly when there is a considerable instrument drift. It takes more time to prepare and run, but it will improve the data validity and you can probably save time at the end.
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معنی conservative دقیق میشه اینجا؟؟
this method is more conservative because it differentiates the variance between the test groups and within the groups.
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The outlier may be because of inherent spatial/temporal variation of data or unexpected factors of practical importance such as malfunctioning pollutant effluent controls, spills, plant shutdown, or hot spots.
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the mean and the standard of the entire data set are used to obtain the z-score of each data point according to the following formula.
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