Detection of physicochemical parameters of drinking water

People have increasingly high requirements for the quality of water used in daily life and drinking water, especially for those with children at home. They attach great importance to the quality of drinking water. If drinking water does not meet the standards, it may often cause irreversible damage to children. So, what are the water quality testing indicators for drinking water? The editor of this issue has brought the standard parameters for drinking water quality testing! I hope it will be of some help to you

1. What are the indicators for detecting drinking water quality

1. Concentration

is an indicator used to reflect the degree of quantification of water color, and drinking water is generally below 15 degrees Celsius.

Observe the degree of blockage in the water suspended under strong light. The turbidity of drinking water should not exceed 5 degrees (NTU)

2. pH value

pH value is the negative logarithm of hydrogen ions in water, reflecting the pH value of the water. A solution with a pH value of 7 is neutral. The higher the pH value, the higher the alkalinity of the solution, the lower the pH value, and the stronger the acidity. Micro alkalinity is suitable for people to consume, and reverse osmosis water is acidic

3. Hardness

Some metal ions are easily combined with certain anions to form precipitates. That is to say, the total concentration of these metal ions is the hardness

The total content of magnesium is generally referred to as hardness, which is equivalent to 10 milligrams of calcium oxide per liter of water. The hardness of water is prone to scaling and precipitation

4. TDS

All residues, evaporated residues, dried at a certain temperature. Its composition is mg/l, including total filtered residue (mineral salt) and non filtered total residue (ss)

5. Electrical conductivity

The hydraulic conductivity reaction parameters are positively correlated with salt content. Conductivity in units of us/cm

6. SDI

Use a standard instrument to measure the density index of sediment and the concentration of colloidal substances in water, indirectly reflecting the blocking speed of impurity particles on the reverse osmosis membrane.

. The smaller the value, the slower the blocking speed; the larger the value, the faster the blocking speed

7. COD

Chemical consumption refers to the oxidation dosage consumed when treating water samples with strong oxidants under certain conditions.

. The higher the COD, the higher the organic matter content in water, and the more serious the pollution

8. BOD

Biological oxygen demand is the oxygen consumption of organic matter that can be completely oxidized and decomposed by microorganisms in water under aerobic conditions. BOD can reflect the content and pollution level of organic matter in water.

9. Total population

Use cfu/ml to indicate the degree of water biological pollution.

10. Escherichia coli

The quality standard for drinking water refers to the most common harmful bacteria in natural water measured in MPN/100ml units.

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