Best identify the underlined item(s) from the list below. Fifteen samples are ta

Question

Best identify the underlined item(s) from the list below. Fifteen samples are taken in the field; duplicates are obtained for five of the samples. All samples are sent to the laboratory for analysis. Prior to any manipulation of the field samples (e.g., extraction, concentration), 100 uL of a solution containing known concentrations of three pure compounds is added to each sample, a. surrogate standard(s) b. blank/control sample(s) c. calibration check(s) d. matrix/spike duplicate(s) e. replicate sample(s) f. none of the above Best identify the underlined item(s) from the list below. While in the field collecting the fifteen samples mentioned above, the technician passes reagent water through the sampling apparatus and collects the effluent. The technician is collecting both field samples and pH data. The pH meter is standardized with previously prepared buffer solutions prior to taking pH readings. a. surrogate standard(s) b. lab blank/control sample(s) c. calibration check(s) d. check samples(s) e. equipment blank sample(s) f. none of the above Best identify the underlined item(s) from the list below. While in the field collecting the fifteen samples mentioned above, the technician passes reagent water through the sampling apparatus and collects the effluent. The technician is collecting both field samples and pH data. The pH meter is checked with a previously prepared buffer solution of known pH prior to taking pH readings. a. surrogate standard(s) b. lab blank/control sample(s) c. check samples(s) d. equipment blank sample(s) e. none of the above A compound similar to the analytes of interest but which is unlikely to be in the original environmental sample is referred to as a: a. Surrogate b. Matrix Spike c. Check Sample d. Reagent Blank True or False: The check sample is spiked with a concentration of analyte at least 5 times greater than the regulatory action level a. True b. False A blank that has been spiked with a known concentration of a particular analyte is known as a. Surrogate b. Matrix Spike c. Check Sample d. Equipment Blank

Explanation / Answer

Question 13) Replicate samples

Question 14) Check Samples

Question 15) Check Samples

Question 16) Surrogate

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