Laboratory control sample definition

Laboratory control sample or “LCS” means a sample of an inert matrix or a matrix with a consistent concentration of the analytes of interest, fortified with a verified known amount of the analytes of interest. The purpose of an LCS is to determine whether the methodology is in control and whether the laboratory is capable of making accurate and precise measurements.
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Laboratory control sample or "LCS" means a sample matrix, free from the analytes of interest, spiked with verified known amounts of analytes or a material containing known and verified amounts of analytes. It is generally used to establish intra-laboratory or analyst specific precision and bias or to assess the performance of all or a portion of the measurement system. "Laboratory control sample" or "LCS" may also be named laboratory fortified blank, spiked blank, or QC check sample.
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Laboratory control sample. (LCS) means a blank matrix to which known concentrations of each of the target method analytes are added. The spiked concentration must be at a mid-range concentration of the calibration curve for the target analytes. The LCS is analyzed in the same manner as the representative sample.
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Examples of Laboratory control sample in a sentence

  • No false negative results suggestive of a high-dose hook effect were observed.

  • Laboratory control sample (LCS) For each batch of samples processed, at least one LCS must be carried throughout the entire sample preparation and analytical process as described in Chapter One.

  • Laboratory control sample (LCS; laboratory fortified blank (LFB); on-going precision and recovery sample; OPR) – An aliquot of reagent water spiked with known quantities of the analytes of interest and surrogates.

  • Laboratory control sample blank recoveries are used to measure accuracy.

  • The contents of the QC summary package include:• Cover sheet;• Laboratory case narrative;• Cooler receipt forms;• COC copy;• Analytical results;• Surrogate summary forms;• Blank summary forms;• Laboratory control sample summary forms; and• Matrix spike/matrix spike duplicate/laboratory duplicates summary forms.The raw data package will consist of the elements presented in the QC summary package but will additionally include the raw data.

  • Laboratory control sample (LCS) shall be analyzed at a rate of at least one per batch of 20 or fewer samples per sample preparation method for each analyte.

  • Laboratory control sample and/or duplicate analyses are within laboratory specified ranges.

  • Laboratory control sample (LCS) results associated with reported sample results were all within control limits, with the exception of one lead result and one nickel result.

  • Laboratory control sample (LCS) is a sample matrix, free from the analyte of interest, which is spiked with a known amount of the analyte at or near the midpoint of the calibration range for the specified analyte.

  • This procedure is necessary to assure thatcyanide associated with particulate matter will be included in themeasurement.• Laboratory control sample (LCS) of the mercury (II) cyanide stock solution was described more concisely.• A note was added to section 11 toexplain ligand-exchange reagents and their use.• Reference materials were updatedin section 15.


More Definitions of Laboratory control sample

Laboratory control sample. (LCS) means a blank matrix to which known concentrations of the target method analytes are added. The LCS is analyzed in the same manner as the representative sample.
Sample 1Sample 2Sample 3
Laboratory control sample means a sample of an inert matrix or a matrix with a consistent concentration of the analytes of interest, fortified with a verified known amount of the analytes of interest, generally used to assess the performance of all or part of a measurement system, or to establish intra-laboratory or analyst bias.
Sample 1
Laboratory control sample. (LCS) means a blank matrix to which known concentrations of each of the target method analytes are added. The
Sample 1
Laboratory control sample. (LCS) means a blank matrix to which known concentrations of each of the target method analytes are added. The spiked concentration must be within the calibration range of the method. The LCS must be carried through the entire sample preparation process and must be analyzed in the same manner as a representative sample. The LCS must be made from a standard that is not from the same vendor, or from the same lot if only one vendor is available, that is used for the calibration curve.must be at a mid-range concentration of the calibration curve for the target analytes. The LCS is analyzed in the same manner as the representative sample.
Sample 1

Related to Laboratory control sample

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