General occupational safety and health rules subdivision z toxic and hazardous substances



Download 0.97 Mb.
Page7/21
Date18.10.2016
Size0.97 Mb.
#2495
1   2   3   4   5   6   7   8   9   10   ...   21



Table II. – Cd Standard Working Range Study

(Flame AAS Analysis)


STD (µg/mL)

Absorbance

reading at

228.8 nm


Statistical analysis


STD (µg/mL)

Absorbance

reading at

228.8 nm


Statistical analysis

Reagent

blank …………



5

4

4



2

3

3



n = 6.

mean = 3.50.

std dev = 1.05.

CV = 0.30.




0.20 …………




161

161


158

n = 3.

mean = 160.0.

std dev = 1.73.

CV = 0.011.



0.020 …………

20

20

20



23

22

20



n = 6.

mean = 20.8

std dev = 1.33.

CV = 0.064.




0.50 …………




391

389


393

n = 3.

mean = 391.0.

std dev = 2.00.

CV = 0.005.



0.050 …………

42

42

42



42

42

45



n = 6.

mean = 42.5.

std dev = 1.22.

CV = 0.029.




1.00 …………




760

748


752

n = 3.

mean = 753.3.

std dev = 6.11.

CV = 0.008.



0.10 ………….




84

80

83



n = 3.

mean = 82.3.

std dev = 2.08.

CV = 0.025.



2.00 …………




1416

1426


1401

n = 3.

mean = 1414.3.

std dev = 12.6.

CV = 0.009.




Table III. – Cd Detection Limit Study

(AAS-HGA Analysis)


STD (ng/mL)

Peak area

readings x

103 at 228.8 nm


Statistical analysis


STD (ng/mL)

Peak area

readings x

103 at 228.8 nm


Statistical analysis

Reagent blank ………

0

0

0



0

1

0



n = 6.

mean = 0.167.

std dev = 0.41.

CV = 2.45.




0.5 ………….

28

26

28



33

28

30



n = 6.

mean = 28.8.

std dev = 2.4.

CV = 0.083.



0.1 …………

8

5

13



6

7

7



n = 6.

mean = 7.7.

std dev = 2.8.

CV = 0.366.




1.0 ………….

52

56

54



55

58

54



n = 6.

mean = 54.8.

std dev = 2.0.

CV = 0.037.



0.2 …………

11

11

12



13

12

12



n = 6.

mean = 11.8.

std dev = 0.75.

CV = 0.064.



2.0 ………….

101

110


110

112

110


110

n = 6.

mean = 108.8.

std dev = 3.9.

CV = 0.036.



Download 0.97 Mb.

Share with your friends:
1   2   3   4   5   6   7   8   9   10   ...   21




The database is protected by copyright ©ininet.org 2024
send message

    Main page