Part 1 Anotlux Disadvantage Of Using The Above Types Of Colibration Is The Presence Of The Matrix The Analite Is Fire 1 (53.34 KiB) Viewed 102 times
Part 1 Anotlux Disadvantage Of Using The Above Types Of Colibration Is The Presence Of The Matrix The Analite Is Fire 2 (77.84 KiB) Viewed 102 times
@ Part 1. Anotlux disadvantage of using the above types of colibration is the presence of the matrix The analite is fired in a matrix that is generally differend from the matrix of the standards. in the graph displays the calibration curve dicect when using the matrix of the standards and when hen using the sample matrix for instance, use standards in distilled water vs vsing standards in seawater simulated . standard's matrix sample's matrix Ssome nath . (CA) uputed (CA actual @ What difference do you see between bith.grophes? What efect do you see from the presence of the matrix? @ Which of the two curves is more sensitive? Using the standards in a matrix other than the sample would it introduo any error in the mosurements @ What would you cecommend in this case? ?
a Part 2. A third spectrophotometric method to quantitatively A determine Pb2+ in blood gives a singal of 0.193 when 1.80 ml of blood is diluted to 5ml. A second blood sample, 1:00 ml, was added 1.00 pol of h 1560 ppb Pb 2+ external standard solution and + diluted to 5ml. This new sample gave a signal @ How many samples were used? @ What was done to the first sample? @ What was done to the second sample that was. different from the first blood sample? @ What is the concentration of Pb +2 in the blood 00.419. sample ? Ascorbic Aciel (Vitamin C) was analyzed by an electrochemical method in 50.0 ml of a sample of orange juice. A current of 1.78 MA was obtained. A A standard adition of 0.700 ml of 0.279 of Absorbic Acid increased current to 3.35uA. What is the concentration of ascorbic acid in the sample?
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