OIL-MULTI-PAK

Built specifically for the ZSX Primus IVi, OIL-MULTI-PAK comes pre-calibrated to quantify 27 elements across the concentration ranges encountered in fuels and lubricants, with sulfur covered from trace levels up to about 4.5 mass%. The data media installed through ZSX Guidance loads sensitivity coefficients derived from 120 mineral-oil standards, optimized measurement conditions, and the FP-based correction models. Startup is straightforward: install, run the included drift-correction, confirm against the supplied validation oil, and you’re analyzing. Default conditions measure all targets in roughly 17 minutes, and the package’s reference LLDs (for example, ~1 ppm for S and ~0.4 ppm for Fe under the default timings) are suitable for routine QC as well as R&D.

The corrections aren’t hand-waving; they’re implemented in ways that remove common failure modes. Hydrocarbon/oxygen variation is corrected using Rh Kα Compton scattering treated as an integrated peak, which stabilizes the matrix estimate across different fill volumes and even in the presence of Mo, where Mo Kβ overlap is explicitly deconvolved. Film effects are handled by a new model that bakes film material, thickness, and impurity into the theoretical intensity—so you can choose polyester or polypropylene to suit the chemistry without rebuilding calibrations. Geometry effects from deep-origin fluorescence in light matrices are corrected in the FP calculation, so you don’t have to hold sample mass constant; when needed, sample thickness is computed from mass and density rather than eyeballing the meniscus.

The package is practical out of the box. Beyond the software, it ships with drift-correction samples, blank paraffin, a multi-element validation oil, disposable cells and syringes, two film types, a density cup, and a portable scale—everything you need to get reliable numbers without hunting for consumables. You can also spin light-weight, task-specific apps from the master package (e.g., sulfur-only methods for fuels) to increase throughput. Accuracy has been demonstrated against JPI heavy-oil standards and NIST SRMs for diesel and gasoline, and repeatability on a commercial lubricant shows sub-1% RSD for elements between ~100–2000 ppm, consistent with routine plant-floor precision.