Buying guide · Sample preparation
The measurement is never better than the preparation. We guide you through the choice between fusion (Katanax) and acid/microwave digestion (Preekem), and what actually affects operation, safety and results.
Sample preparation determines whether the measurement is representative. Incorrect matrix effects, incomplete dissolution or contamination are not always visible in the measurement data, but surface during audits.
Labsense supplies Katanax automated fluxers for fusion and Preekem microwave digestion systems for acid digestion. Here's what you should consider.
Sample type
Slag, minerals, cement and oxidic metals are suitable for fusion digestion. Biological samples, soil, water, foodstuffs and organic matrices are suitable for microwave digestion. Some labs require both.
Measuring instruments
Fused beads go directly into XRF for homogeneous, matrix-free measurement. Microwave-digested solutions go to ICP-OES/MS, AAS or ion chromatography. Choose preparation that matches your existing equipment.
Throughput
Katanax X-300/X-600 runs 1–6 beads per cycle automatically. The Preekem TOPEX series runs 8–40 vessels per batch. Count not only measurement time — count the full cycle including cooling and cleaning.
Safety
Microwave digestion takes place under pressure with concentrated acids — vessel handling, ventilation and burst protection must be in place. Fusion reaches 1100 °C; placement and off-gas management are equally critical.
Consumables & traceability
Fluxes, crucibles, vessels, and fuse discs are consumables with ongoing costs. Lot traceability for fluxes is required in accredited labs. Calculate the total cost per sample, not just the initial investment.
Service & validation
Temperature sensors, weighing cycles and pressure curves must be calibrated periodically. Ensure the supplier has a documented validation procedure and Swedish technician coverage before signing the quote.
Submit a sample description and we will propose the right preparation method, instrument and consumables package, ideally with demo samples run at our facility.
For sample preparation for XRF, ICP-OES and ICP-MS, two main routes are often compared: fusion and microwave digestion. Here is our portfolio in context.
Our portfolio: Katanax K2 Prime, X-300, and X-600 (induction fusion). Common alternatives: Claisse TheOx / Eagon 2 / M4 (Malvern Panalytical), Herzog HAG / HSF, XRF Scientific Phoenix / xrFuse. Borate fusion yields lithium tetraborate or metaborate glass discs for XRF or soluble matrix for ICP, robust for silicates, oxides, slag, and cement.
Our portfolio: Preekem WX-8000 (high-pressure rotor), M6, P3, and U2. Common alternatives: Milestone ETHOS UP / ultraWAVE, CEM MARS 6, Anton Paar Multiwave 5000/7000, Berghof speedwave. Microwave digestion is the first choice for organic matrices, biota, food, and environmental samples where solution-phase preparation for ICP is required in accordance with US EPA 3051A/3052.
