A tintometer is used to determine which of the following water quality parameters?
Understanding Tintometers and Water Quality Parameters
The question asks about the specific water quality parameter that a tintometer is used to determine. Water quality is assessed using various instruments, each designed to measure different characteristics.
Let's look at the options provided and what they represent in terms of water quality:
- Turbidity: This refers to the cloudiness or haziness of water caused by suspended particles. It is typically measured using a turbidimeter or nephelometer.
- Specific conductivity: This is a measure of the ability of water to conduct an electric current, which is related to the concentration of dissolved salts and minerals. It is measured using a conductivity meter.
- Colour: This refers to the true colour (dissolved substances) and apparent colour (dissolved and suspended substances) of water. It is often measured by comparing the water sample's colour to standard colour solutions or using instruments like a tintometer or spectrophotometer.
- Taste: This is a subjective sensory characteristic of water, usually assessed by human panelists. Instruments are not typically used to measure taste directly in this context, although chemical analysis can identify compounds causing certain tastes.
A tintometer is an instrument specifically designed for colour measurement, often used in various industries, including water analysis, to quantify the colour of liquids or solids by matching the sample's colour to combinations of standard colour filters.
Therefore, based on the function of a tintometer, it is used to determine the colour of water.
Let's summarize the instrument-parameter relationships discussed:
| Water Quality Parameter | Typical Measuring Instrument |
|---|---|
| Turbidity | Turbidimeter / Nephelometer |
| Specific Conductivity | Conductivity Meter |
| Colour | Tintometer / Spectrophotometer |
| Taste | Sensory evaluation (human panelists) |
Thus, the tintometer is used for determining the colour of water.
Revision Table: Key Water Quality Instruments
| Instrument | Parameter Measured | Brief Description |
|---|---|---|
| Tintometer | Colour | Compares sample colour to standard colours or filters. |
| Turbidimeter | Turbidity | Measures the scattering of light by suspended particles. |
| Conductivity Meter | Specific Conductivity | Measures electrical conductance related to dissolved ions. |
Additional Information on Water Colour Measurement
Water colour can be classified into two types:
- True Colour: Caused by dissolved substances. It is measured after removing turbidity.
- Apparent Colour: Caused by both dissolved and suspended substances. It is measured directly on the water sample.
Colour in water can be introduced by natural sources like decaying vegetation (tannins, lignins), minerals (iron, manganese), or by industrial pollutants. Measuring colour is important for aesthetic reasons and can sometimes indicate the presence of harmful substances.
The unit for colour measurement is often the Platinum-Cobalt (Pt-Co) unit, also known as the Hazen unit (HU) or Alpha unit.
Important Questions from Quality of Water
On which scale the turbidity is measured?
Which of the following represents the approximate overflow rate (litres/hours/m2) for the plain sedimentation tank?
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