SAK 254, Nitrate and Iron Test 1

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What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

Ultraviolet light measurement

Spectral absorption coefficient at 254 nm

Dissolved organic water constituents

SAK 254 (correct)

What does the SAK 254 method help determine in water samples?

Inorganic mineral composition

Turbidity and coloration

Total dissolved solids

Dissolved organic contents (correct)

What must be done to the water sample before using the SAK 254 method for measurement?

Heating

Carbonation

Filtering (correct)

Distillation

What is the pore size of the membrane filter required for filtering raw and drinking water for SAK 254 measurement?

0.45 µm Signup and view all the answers

At what wavelength is the measurement carried out photometrically in the SAK 254 method?

$\lambda = 254$ nm Signup and view all the answers

What does the spectral absorption coefficient at 254 nm characterize in water samples?

Organic substances Signup and view all the answers

What does the spectral attenuation coefficient µ  measured at a wavelength of 254 nm, represent?

Sum of spectral absorption and scattered-coefficient at 254 nm Signup and view all the answers

How is the light reduction in the water sample measured?

By Lambert-Beer law Signup and view all the answers

What is the significance of using a 0.45 µm filter during membrane filtration?

To remove most contents in the water sample Signup and view all the answers

What can cause false results in the measurements?

All of the above Signup and view all the answers

What is the dependence range suitable for measurements according to the text?

$0.01 \text{ mol/L} < \text{concentration} < 2$ Signup and view all the answers

What does the corrected spectral attenuation coefficient measure?

Stray-light corrected spectral attenuation coefficient at 254 nm Signup and view all the answers

What is the measurement wavelength for the water sample with a spectrophotometer?

$\lambda = 254$ nm Signup and view all the answers

What is used to wash the quartz measuring cell?

$2 \text{ mol/L}$ hydrochloric acid solution Signup and view all the answers

What is used for membrane filtration?

$0.45 \mu m$ syringe filter Signup and view all the answers

What does the SAK 254 method help determine in water samples?

Presence of dissolved organic substances Signup and view all the answers

What is the significance of using a 0.45 µm filter during membrane filtration for SAK 254 measurement?

To filter out dissolved organic substances for measurement Signup and view all the answers

What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

SAK 254 Signup and view all the answers

What must be done to the water sample before using the SAK 254 method for measurement?

Filter the water sample with a 0.45 µm filter Signup and view all the answers

What does the spectral absorption coefficient at 254 nm characterize in water samples?

Presence of dissolved organic substances Signup and view all the answers

What is used for membrane filtration before carrying out the SAK 254 measurement?

0.45 µm membrane filter Signup and view all the answers

What is the measurement wavelength for the water sample with a spectrophotometer?

254 nm Signup and view all the answers

What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

α(λ) Signup and view all the answers

What must be done to the water sample before using the SAK 254 method for measurement?

Filtering with a 0.45 µm filter Signup and view all the answers

What does the spectral attenuation coefficient µ  measured at a wavelength of 254 nm, represent?

Sum of spectral absorption coefficient and spectral scattered-coefficient Signup and view all the answers

What can cause false results in the measurements?

Degassing oxygen or carbon dioxide Signup and view all the answers

What is the significance of using a 0.45 µm filter during membrane filtration?

To remove most contents in the water sample Signup and view all the answers

What does the corrected spectral attenuation coefficient measure?

Stray-light corrected spectral attenuation coefficient Signup and view all the answers

What is used to wash the quartz measuring cell?

Cell cleaning solution Signup and view all the answers

What does the spectral absorption coefficient at 254 nm characterize in water samples?

Spectral absorbance (extinction) Signup and view all the answers

SAK 254, Nitrate and Iron Test 1

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Questions and Answers

What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

What does the SAK 254 method help determine in water samples?

What must be done to the water sample before using the SAK 254 method for measurement?

What is the pore size of the membrane filter required for filtering raw and drinking water for SAK 254 measurement?

At what wavelength is the measurement carried out photometrically in the SAK 254 method?

What does the spectral absorption coefficient at 254 nm characterize in water samples?

What does the spectral attenuation coefficient µ  measured at a wavelength of 254 nm, represent?

How is the light reduction in the water sample measured?

What is the significance of using a 0.45 µm filter during membrane filtration?

What can cause false results in the measurements?

What is the dependence range suitable for measurements according to the text?

What does the corrected spectral attenuation coefficient measure?

What is the measurement wavelength for the water sample with a spectrophotometer?

What is used to wash the quartz measuring cell?

What is used for membrane filtration?

What does the SAK 254 method help determine in water samples?

What is the significance of using a 0.45 µm filter during membrane filtration for SAK 254 measurement?

What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

What must be done to the water sample before using the SAK 254 method for measurement?

What does the spectral absorption coefficient at 254 nm characterize in water samples?

What is used for membrane filtration before carrying out the SAK 254 measurement?

What is the measurement wavelength for the water sample with a spectrophotometer?

What is the designation for the spectral absorption coefficient measured at a wavelength of 254 nm?

What must be done to the water sample before using the SAK 254 method for measurement?

What does the spectral attenuation coefficient µ  measured at a wavelength of 254 nm, represent?

What can cause false results in the measurements?

What is the significance of using a 0.45 µm filter during membrane filtration?

What does the corrected spectral attenuation coefficient measure?

What is used to wash the quartz measuring cell?

What does the spectral absorption coefficient at 254 nm characterize in water samples?

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