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Question 18 A spectrophotometric method was developed to determine the Pb2* in blood using Cu2* as an internal standard. A standard 1.75 ppb of Pb2+ and 2.25 ppb of Cu2+ gives a signal ration of 2.37. A blood sample, to which the same amount of internal standard was added, gave a signal ration of 1.80. Calculate the Pb2* in the blood sample. O A. 1.33 ppb О В. 13.3 рpb О С. 1.75 ppb O D.7.47 ppb

Question 18 A spectrophotometric method was developed to determine the Pb2* in blood using Cu2* as an internal standard. A standard 1.75 ppb of Pb2+ and 2.25 ppb of Cu2+ gives a signal ration of 2.37. A blood sample, to which the same amount of internal standard was added, gave a signal ration of 1.80. Calculate the Pb2* in the blood sample. O A. 1.33 ppb О В. 13.3 рpb О С. 1.75 ppb O D.7.47 ppb

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question 18 A spectrophotometric method was developed to determine the Pb2* in blood using Cu?* as an internal standard. A standard 1.75 ppb of Pb2+ and 2.25 ppb of Cu2+ gives a signal ration of 2.37. A blood sample, to which the same amount of internal standard was added, gave a signal ration of 1.80. Calculate the Pb2* in the blood sample. О А. 1.33 ppb О . 13.3 ppb ОС. 1.75 ppb O D.7.47 ppb
Transcribed Image Text:Question 18 A spectrophotometric method was developed to determine the Pb2* in blood using Cu?* as an internal standard. A standard 1.75 ppb of Pb2+ and 2.25 ppb of Cu2+ gives a signal ration of 2.37. A blood sample, to which the same amount of internal standard was added, gave a signal ration of 1.80. Calculate the Pb2* in the blood sample. О А. 1.33 ppb О . 13.3 ppb ОС. 1.75 ppb O D.7.47 ppb
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