Potassium

This test paper shows potassium as orange-red spots on a light yellow background. Rubidium, cesium and thallium(I) also produce orange-red color reactions. Excess of sodium and heavy metal ions reduce sensitivity. Larger amounts of ammonium ions cause interfering discolorations. In the instructions for use, which are supplied with the paper, a special method is provided to circumvent any of these interferences. For semi-quantitative determination see Ref 91316 QUANTOFIX® Potassium. Instruction Sheet (pdf)

Color reaction: bright-yellow → orange

Scope of delivery: 200 test strips in a plastic box

Test sticks and reagents for the semi-quantitative determination of potassium (K + ) in solutions. Sodium ions > 3000 mg/L cause low results. The following ions do not interfere: less than 1000 mg/L Al 3+, Ba 2+, Bi 3+, Ca 2+, Fe 2+/Fe 3+, Mg 2+, Mn 2+, Sr 2+, Zn 2+; less than 200 mg/L NH 4 +, Hg +/Hg 2+, Tl +; less than 25 mg/L S 2. Protect test sticks from sunlight and moisture. Store package in a cool and dry place (storage temperature below + 30°C). This test allows the quick and easy determination of potassium in solutions. It includes all necessary reagents so that the measurement can be started immediately. A reliable result is obtained within 1 minute. The natural potassium content in ground water is generally about 1– 2 mg/L K. Higher values may indicate fecal contaminations, but can also originate from potassium fertilizers. For the growth of plants and animals potassium is an essential factor. Especially in agriculture the determination of potassium therefore gains increasing importance. Instruction Sheet (pdf)

Color Reaction: bright yellow→ orange

Scope of delivery: 100 test strips in a tube, additional reagents, instruction leaflet in a box

Potassium reacts with sodium tetraphenylborate to form a precipitate. Under defined conditions this turbidity can be used for concentration measurements. Turbidities interfere and have to be filtered prior to the test. Good reproducibility is obtained for drinking, surface and ground water. For polluted waste waters low potassium values are measured. The natural potassium content in ground water is generally about 1 – 2 mg/L K⁺. Higher values may indicate faecal contaminations, but can also originate from potassium fertilisers. For the growth of plants and animals potassium is an essential factor. Especially in agriculture the determination of potassium therefore gains increasing importance. Instruction Sheet (pdf)

Sea water analysis: Yes

Scope of delivery: Reagents for 60 tests, color chart and accessories in a box

Tube test for the determination of Potassium. Precise rapid tests for all kind of water and waste water samples. Time-saving and reliable analysis together with our NANOCOLOR photometers. Instruction Sheet (pdf)

Sea water analysis: Yes

Scope of delivery: Rugged box with 20 test tubes. Sufficient for 20 tests