Shenzhen Weizhijun Biotechnology
Shenzhen Weizhijun Biotechnology purchased a VicoMeter WKT-A9 Karl Fischer Moisture Analyzer together with the matching WKT-V1 Karl Fischer oven. The WKT-A9 Karl Fischer moisture titrator is a coulometric Karl Fischer moisture titrator designed and developed in-house with independent intellectual property rights — a Karl Fischer moisture analyzer for mid-to-high-end applications.
Coulometric (coulometry) principle, ideal for trace-level testing; 5-inch color touchscreen with smart operation, automatic result calculation, and freely configurable sample IDs; complies with multiple national standards and suits virtually every industry.
8 moisture calculation formulas, 6 determination methods, and 8 end-point detection algorithms
Automatic drift compensation, automatic subtraction of ambient and background moisture, and self-diagnostic fault alerts
One-touch start for reliable results
Outstanding automation — connects seamlessly to the Karl Fischer oven for difficult samples
RS232 interface for connection to a PC, printer, PLC, or LIMS
When measuring moisture with a Karl Fischer analyzer, most samples can be added directly to the generator cell/titration cell for simple, accurate testing. Some samples, however, cannot be added directly because their moisture is not released naturally or they undergo side reactions with the Karl Fischer reagent — for example powders, granules, pastes, and oxidizing inorganic salts.
For samples that cannot be added directly to the cell, pairing the WKT-V2 Karl Fischer oven for gas-phase extraction is the perfect solution. The sample is placed in a vial and moved onto the oven, heated to a specific temperature (up to 300˚C), and the moisture is extracted and carried into the cell by dry air or nitrogen, then measured perfectly.
The customer mainly tests lyophilized products. Since the customer had never sent samples to VicoMeter before, sales had recommended the WKT-C9 based on typical lyophilized products. However, after arriving on site for installation, the VicoMeter technical engineer discovered a problem: the customer's lyophilized products were completely insoluble in the organic solvent methanol, so the WKT-C9 simply could not test the customer's samples.
After explaining the situation, the VicoMeter technical engineer replaced it with the WKT-V1-A9, an instrument dedicated to moisture testing of insoluble solid samples. After installation, a simple comparison was made between the VicoMeter halogen moisture analyzer and the Karl Fischer moisture analyzer: the halogen Model 01S gave a moisture result of 1.2158%, while the WKT-V1-A9 gave 1.1202%. This difference is entirely within the expected range, because a halogen moisture analyzer measures not only moisture but also volatile matter, whereas the WKT-V1-A9 measures moisture only — so the halogen moisture analyzer's reading is naturally higher than that of the Karl Fischer moisture analyzer.
Shenzhen Weizhijun Biotechnology Co., Ltd. was established on November 6, 2017. Its general business scope includes: R&D of biological products; biotechnology research and promotion; import and export operations; R&D and technical services for biomedicine; science and technology information consulting; R&D of Class I, II, and III medical devices; and technology promotion of medical devices. Its licensed business scope includes: manufacture and sales of biomass extraction machinery and accessories; production and wholesale of pharmaceuticals; biological and pharmaceutical technology research; biotechnology and biomedical engineering technology development; and related technical information consulting. Shenzhen Weizhijun Biotechnology Co., Ltd. has invested in three companies.
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