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Suspended solids 50 / M383
Suspended solids 50
10 - 750 mg/L TSS
Turbidity / Attenuated Radiation Method
M383
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
XD 7000, XD 7500
Cuvette
□ 50 mm
λ
810 nm
Measuring Range
10 - 750 mg/L TSS
Material
Required material (partly optional):
Reagents no reagent required
Packaging Unit Part Number
Application List
• Drinking Water Treatment
• Waste Water Treatment
• Raw Water Treatment
Sampling
1. Measure the water sample as soon as possible after sampling. It is possible to store the sample at 4 °C for 7 days s in plastic or glass containers. The measurement should be at the same temperature as the sample. Temperature differences between measurement and sampling can change the result of the measurement.
Notes
1. The photometric determination of Suspended Solids is based on a gravimetric method. In a laboratory this is usually done by evaporation of the filter residue of a filtrated water sample in a furnace at 103 °C – 105 °C and weighing of the dried residue.
2. When higher accuracy is required perform a gravimetric determination of a water sample. The result can be used to calibrate the photometer with the same water sample.
3. The estimated detection limit is 20 mg/L TSS.
EN Method Reference Book 1.0
Suspended solids 50 / M383
EN Method Reference Book 1.0
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Suspended solids 50 / M383
Determination of Total suspended solids
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
Homogenize 500 mL of the water sample in a blender on high speed for 2 minutes
VE
50 mm
Zero
50 mm
Blank
Fill 50 mm vial with deionised water .
Place blank in the sample chamber. • Pay attention to the positioning.
Press the ZERO button.
50 mm
Remove vial from the sample chamber.
Empty vial.
For devices that require no ZERO measurement , start here .
Mix homogenised water sample thoroughly.
50 mm
Rinse out vial with prepared sample .
Fill 50 mm vial with sample .
EN Method Reference Book 1.0
Suspended solids 50 / M383
50 mm
Test
Place sample vial in the sample chamber. • Pay
Press the TEST (XD:
START )button.
attention to the positioning.
The result in mg/L TSS (Total Suspended Solids) appears on the display.
EN Method Reference Book 1.0
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Suspended solids 50 / M383
Chemical Method
Turbidity / Attenuated Radiation Method
Appendix
f e c d a b
Calibration function for 3rd-party photometers
Conc. = a + b∙Abs + c∙Abs 2 + d∙Abs 3 + e∙Abs 4 + f∙Abs 5
□ 50 mm
8.02365 ∙ 10 +0
1.44739 ∙ 10 +2
7.70483 ∙ 10 +1
-3.84183 ∙ 10 +1
9.71408 ∙ 10 +0
Interferences
Removeable Interferences
• Air bubbles interfere and can be removed by swirling the vial gently.
• Colour interferes if light is absorbed at 660 nm.
Method Validation
Limit of Detection
Limit of Quantification
End of Measuring Range
Sensitivity
Confidence Intervall
Standard Deviation
Variation Coefficient
Derived from
EN 872:2005
0.42 mg/L
1.27 mg/L
750 mg/L
272.94 mg/L / Abs
3.96 mg/L
2.06 mg/L
0.54 %
EN Method Reference Book 1.0
