Problems in industrial water quality testing
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According to the measurement standards for all-silicon components, pipettes made of plexiglass are required, but I’ve asked many suppliers of accessories, and none of them have them. May I use a pipette with glass? Can glass volumetric flasks be used when calibrating the curve? Additionally, the cuvettes used in spectrophotometers can be made of glass or quartz; however, quartz cuvettes are very expensive, costing around 50 to 60 per unit, while glass cuvettes cost less than 10 yuan. The owner said that glass cuvettes are sufficient for normal use, and quartz cuvettes should only be used when measuring strong acids or substances containing fluorides. May I ask if glass can be used when measuring total phosphorus, total iron, and silicon?
Regarding the determination of silicon content in water, hard glassware and measuring instruments can be used unless extremely high accuracy and analysis of samples with very low concentrations are required. However, when conducting trace analysis and highly accurate analyses, strict attention must be paid to potential contamination caused by glass during sample extraction, sample preparation, and the color development process.
Sure, both quartz and glass contain silicon
When measuring silicon, both glass and quartz materials have an impact, but they can be used when high precision is not required; organic materials are used when high precision is needed. They can be used for measuring phosphorus, iron, and other elements as well.
It can be used, unless the content is extremely low
It can be used if the content is not too low