beautypg.com

LaMotte DC1600 Colorimeter User Manual

Page 46

background image

PROCEDURE

1.

Rinse a clean colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.

2.

Select setting 3 on “Select Wavelength” knob and press “30 Second Read” button.

3.

Insert tube into colorimeter chamber and adjust to 100%T with “Set Blank” knob. This is 100%T blank.

4.

Remove tube from colorimeter. Use the 0.5 mL pipet (0353) to add one measure of *Iron Reagent #1 (V-4450). Cap

and mix.

5.

Use the 0.1 g spoon (0699) to add 0.1 g of *Iron Reagent #2 (V-4451). Cap and shake vigorously for 30 seconds. Wait

three minutes for maximum color development.

6.

At the end of 3 minute waiting period, press “30 Second Read” button and insert tube into colorimeter chamber.

Record %T as soon as reading stabilizes.

7.

Consult calibration chart to determine iron concentration in parts per million (ppm).

DC1600 IRON ~ BIPYRIDYL CALIBRATION CHART

%T

9

8

7

6

5

4

3

2

1

0

90

0.02

0.04

0.05

0.07

0.09

0.11

0.13

0.15

0.16

0.18

80

0.20

0.22

0.24

0.26

0.28

0.30

0.33

0.35

0.37

0.39

70

0.41

0.44

0.46

0.48

0.50

0.53

0.55

0.58

0.60

0.63

60

0.65

0.68

0.70

0.73

0.76

0.78

0.81

0.84

0.87

0.90

50

0.93

0.96

0.99

1.02

1.06

1.09

1.12

1.16

1.19

1.23

40

1.26

1.30

1.34

1.38

1.42

1.46

1.50

1.54

1.58

1.63

30

1.68

1.72

1.77

1.82

1.87

1.93

1.98

2.04

2.10

2.16

20

2.22

2.28

2.35

2.42

2.49

2.57

2.65

2.73

2.82

2.91

10

3.01

3.11

3.22

3.33

3.46

3.59

3.73

3.88

4.05

4.24

0

4.44

4.67

4.90

46