2
Triazole PP / M388
Triazole PP
1 - 16 mg/L Benzotriazole or Tolyltriazole
Catalyzed UV Digestion
M388 tri
Instrument specific information
The test can be performed on the following devices. In addition, the required cuvette and the absorption range of the photometer are indicated.
Instrument Type
MD 100, MD 110, MD 600,
MD 610, MD 640, XD 7000,
XD 7500
Cuvette
ø 24 mm
λ
430 nm
Measuring Range
1 - 16 mg/L Benzotriazole or Tolyltriazole
Material
Required material (partly optional):
Reagents
VARIO Triazole Rgt Powder Pack F25
Vario Rochelle Salt Solution, 30 ml h)
The following accessories are required.
Accessories
UV Pen Lamp, 254 nm
UV protection glasses, orange
Packaging Unit Part Number
Powder / 100 pc. 532200
30 mL 530640
Packaging Unit
1 pc.
1 pc.
Part Number
400740
400755
Hazard Notes
While the UV lamp is in operation, UV safety goggles must be worn.
Application List
• Boiler Water
Sampling
1. Measure the water sample as soon as possible after sampling.
EN Method Reference Book 1.0
Triazole PP / M388
Preparation
1. To get accurate results the sample temperature must be between 20 °C and 25 °C.
2. Nitrites or borax-containing water must be adjusted between pH 4 and pH 6 before the analysis (with 1N Sulphuric acid).
3. If the sample contains more than 500 mg/L CaCO
3
Salt Solution are to be added.
hardness, 10 drops of Rochelle
Notes
1. Triazole Reagent Powder Packs and UV maps available on request.
2. For handling of the UV lamp see manufacturer's manual. Do not touch the surface of the UV lamp. Fingerprints will erode the glass. Wipe the UV lamp with a soft and clean cloth between measurements.
3. The test does not distinguish between Tolyltriazole and Benzotriazole.
EN Method Reference Book 1.0
3
Triazole PP / M388
Determination of Benzotriazole / Tolyltriazole with Vario Powder
Packs
Select the method on the device.
For this method, a ZERO measurement does not have to be carried out every time on the following devices: XD 7000, XD 7500
25 mL
Fill the digestion vial with
25 mL sample.
Add powder pack .
Close digestion vial.
4
Swirl around to dissolve the powder.
Keep the UV lamp in the sample.
Note: wear UV safety goggles!
5 min
Turn on the UV lamp.
Press the ENTER button.
9
8
10
11 12
7
6
1
5
2
3
4
Wait for 5 minute(s) reaction time .
The UV lamp is switched off when the countdown is finished.
EN Method Reference Book 1.0
Triazole PP / M388
Remove the UV lamp from the sample.
10 mL
Close digestion vial.
Invert several times to mix the contents.
Fill 24 mm vial with 10 mL deionised water .
Close vial(s).
Sample
Place sample vial in the sample chamber. Pay attention to the positioning.
Zero
Press the ZERO button.
Remove the vial from the sample chamber.
Empty vial.
For devices that require no ZERO measurement , start here .
EN Method Reference Book 1.0
5
Triazole PP / M388
10 mL
Test
Sample
Fill 24 mm vial with 10 mL prepared sample .
Place sample vial in the sample chamber. Pay
Press the TEST (XD:
START )button.
attention to the positioning.
The result in mg/L Benzotriazole or Tolyltriazole appears on the display.
6 EN Method Reference Book 1.0
Triazole PP / M388
Analyses
The following table identifies the output values can be converted into other citation forms.
Unit mg/l mg/l
Cite form
Benzotriazole
Tolyltriazole
Scale Factor
1
1.1177
Chemical Method
Catalyzed UV Digestion
Appendix
f c d a b e
Calibration function for 3rd-party photometers
Conc. = a + b∙Abs + c∙Abs 2 + d∙Abs 3 + e∙Abs 4 + f∙Abs 5
ø 24 mm
-2.31524 ∙ 10 -1
1.75481 ∙ 10 +1
□ 10 mm
-2.31524 ∙ 10 -1
3.77285 ∙ 10 +1
Interferences
Persistant Interferences
• Should the photolysis be carried out for more or less than 5 minutes, this may lead to showing lower results.
Bibliography
Harp, D., Proceedings 45th International Water Conference, 299 (October 22-24, 1984) h)
additionally required for samples with hardness values above 300 mg/l CaCO
3
EN Method Reference Book 1.0
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