Application of the WKT-A9 'Exquisite' Karl Fischer Trace Moisture Analyzer at Jiangsu Changmei Medical Devices — VicoMeter | Jiangsu Victor Instrument Meter Co., Ltd.

VicoMeter On-site Training

Customer Profile

The customer purchased the VicoMeter WKT-A9 'Exquisite' Karl Fischer trace moisture analyzer together with the matching WKT-V1 Karl Fischer oven. Based on the coulometric Karl Fischer principle, the VicoMeter WKT-A9 'Exquisite' rapidly determines trace moisture in samples down to 0.001ppm, and can measure trace moisture in solids, liquids, and powders within 1 minute. The instrument features a built-in printer and can store 500 sets of data for real-time query and printing. Innovative navigation-style prompts and a built-in electronic manual make operation effortless. Complying with multiple national and international moisture determination standards, the WKT-A9 includes eight built-in moisture calculation formulas and six determination methods to meet the needs of various industries. It is widely used in the chemical, petroleum, pharmaceutical, power, food, research, and testing industries.

WKT-A9 Karl Fischer Trace Moisture Analyzer Coulometric

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

WKT-V2 Karl Fischer Oven Moisture Measurement System

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.

VicoMeter at the Customer Site

After arriving at the customer's site, the VicoMeter technical engineer checked the instrument list with the customer and began installation once everything was confirmed. The installation went smoothly, but the engineer encountered a problem during instrument verification: after nitrogen was connected, the electrolysis rate rose to about 6 and would not come down, and the instrument took a long time to stabilize. Since the reagent was freshly opened, a reagent problem was ruled out. Two possibilities were considered: 1. the customer's nitrogen purity was not up to standard; 2. the customer's molecular sieve had absorbed moisture due to recent frequent rain. To verify, the engineer connected the nitrogen directly to the Karl Fischer oven without passing it through the molecular sieve — and the electrolysis rate immediately dropped to about 1.2. The engineer therefore concluded that the molecular sieve had absorbed moisture, removed it, and dried it in a constant-temperature oven at 120° for 2 hours. After reinstallation, the electrolysis rate stabilized at about 1.6 and the instrument quickly reached equilibrium. Subsequent acceptance and testing went smoothly, and the customer was very satisfied with the instrument.

Customer Profile

Jiangsu Changmei Medical Device

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Jiangsu Changmei Medical Device

Jiangsu Changmei Medical Devices Co., Ltd. was established on July 17, 2013, with its registered address at No. 27 Xinke West Road, Luoyang Town, Wujin District, and Yuan Luxin as its legal representative. Its business scope includes: manufacture of medical devices (Class III products produced within the scope approved in the Medical Device Manufacturing Enterprise License); R&D, manufacture, and sales of electromechanical equipment and accessories and computer hardware and software; import and export of various goods and technologies on a self-operated or agency basis (except those restricted or prohibited by the state); production of Class I medical devices; production of Class II medical devices; production and sales of daily-use masks (non-medical); production and sales of labor protection supplies; and sales of industrial textile finished products (for items subject to approval, business activities may only be carried out after approval by the relevant departments).