Description
Potassium as a chemical element is normally found in nature. It is present in soil and drinking water and is also an essential element for the growth of plants and animals.
Potassium concentration is important in determining soil quality in greenhouse, agriculture, and horticulture applications. Potassium salts are also a common component of fertilizers.
The HI 96750 measures potassium (K) content in water samples in the range of 0.0 to 10.0 mg/l (ppm) for the low range of 10 to 100 mg/l (ppm) for the medium range. HI 96750 uses the Tetraphenylborate Method. The reaction between potassium and reactants causes turbidity in the sample.
The HI 96750 uses a unique positive locking system to ensure that the cuvette is in the same place each time it is placed in the measuring cell.
The importance of potassium for plant growth differs somewhat from nitrogen and phosphorus, differing in that potassium acts more as a catalyst in the carbohydrate metabolism of plants. More than 60 plant enzymes need potassium to be activated.
Among the important functions of potassium is its ability to help with water regulation in plants, its contribution to the formation of ATP molecules, and as a necessary component for nitrogen uptake and protein synthesis.
Plants that lack adequate potassium use water less efficiently, typically have low nitrogen intake, and low activity in protein synthesis. Plants with a higher potassium supply are able to more quickly assimilate carbon dioxide into sugars during photosynthesis.
SPECS:
Range: Potassium LR (P1): 0.0 to 10.0 mg/L (ppm); Potassium MR (P2): 10 to 100 mg/L (ppm)
Resolution: Potassium LR (P1): 0.1 mg/L; Potassium MR (P2): 1 mg/L
Accuracy: Potassium LR (P1): ±1.5 mg/L ±7% of reading; Potassium MR (P2): ±15 mg/L ±7% of reading
Light Source: Light Emitting Diode
Light detector: silicon photocell with narrowband interference filter @ 466nm
Power Source: 9V Battery
Auto-off: after 10 minutes of non-use in metering mode
Ambient: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions: 192 x 104 x 69 mm (7.6 x 4.1 x 2.7″)
Weight: 360 g (12.7 oz.)
Method: Adaptation of the standard method for the study of water and wastewater, amino acid method
