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*TURBIDITY SCIENCE Technical Information Series—Booklet No. 11 By Michael J. Sadar (Hach 1998) | |||
**Definition of turbidity | |||
**Explanation of several measurement methods | |||
*[http://rsi.aip.org/resource/1/rsinak/v60/i9/p3051_s1 A computercontrolled turbidity apparatus] | *[http://rsi.aip.org/resource/1/rsinak/v60/i9/p3051_s1 A computercontrolled turbidity apparatus] | ||
Revision as of 21:21, 13 June 2013
- TURBIDITY SCIENCE Technical Information Series—Booklet No. 11 By Michael J. Sadar (Hach 1998)
- Definition of turbidity
- Explanation of several measurement methods
- A computercontrolled turbidity apparatus
- I_t = I_0e^{-(α+τ)l}
- We're looking for τ.
- Aparatus for measuring turbidity as function of temperature; includes oven to place sample in. Claims 0.001/mm accuracy and 0.5% precision.
- They measure transmitted light and assume no absorbtion; use a laser of polarized light with beam splitter.
- Use chopper to measure ac instead of dc, claim order of magnitude better long-term stability from it.
- Much improvement from simultaneous reference and measurement beam.
- Development of a Precise and in Situ Turbidity Measurement System
- Can't get the article so far.
- LED marine beam transmittance meter
- Comparable to our stuff, but analog.
- 2% accuracy claimed.
- Light Scattering Determination of the Absolute Turbidity of Water
- Report of some measurements; low-NTU values needs 90° measurement, not transmission.
- Light Transmittance of Solid Polymeric Film including Spherulites
- Not available at this moment.
- On the Absolute Turbidity of Water
- Another measurement report.
- Simple Ratio Photometer
- Analog instrument using photomultipliers and a mercury lamp.
- Taking a reference while measuring (instead of before or after) allows for a less stable light source.
- A Turbidity Comparator
- Article from 1942; old aparatus, old electronics setup; not really useful.
- Comparison Type Nephelometer
- Measure transmitted and scattered light with an integrating sphere each, and direct intensity, all three at once.
- Polarized, old style (1952), not really useful.
- Direct and indirect determination of the Linke turbidity coefficient
- Not relevant for us; it's about air turbidity.
- Expressions for Turbidities
- Note how to compute turbidity with only tabulated functions. Irrelevant now we have computers.
- Inverted turbidity versus concentration dependence for aqueous polynucleotide–protein mixtures: Visible turbidity at low concentrations
- Not about measurement method.
- Simple reusable hermetically‐sealed spectrophotometer cuvette for turbidity studies near binary liquid critical points
- Cuvettes for measurements that take long (months).
- Probably not relevant for us.