Proven physics, numbers delivered on your stream.
Thiosulfate and sulfate are strong Raman-active oxyanions with well-defined bands - the sulfate symmetric stretch near 976 cm⁻¹ was measured directly in a Gekko fertilizer study. Your feasibility study builds the chemometric model on your ATS, KTS/CaTS or AMS matrix and puts the accuracy figures and the savings case on the table.
Your study puts the numbers on your stream.
A Gekko feasibility study builds a validated chemometric model on your ATS, KTS/CaTS or AMS matrix and hands you the accuracy figures and the savings case - the quantified basis for the inline decision. Inline means the analyzer reads thiosulfate concentration and N/S ratio in the absorption stream, pipeline or tank itself, with no sampling and no 20-to-60-minute wait on the lab.
The study runs in the Gekko lab on the benchtop Spectrally X1 LAB - the same measurement and model stack that later runs on the Spectrally X1 INLINE at your line. What the report shows is what the analyzer reads in production.
Your samples, measured against your reference method
Thiosulfate liquors are a well-defined Raman matrix. The study correlates the Raman spectrum of your ATS, KTS/CaTS or AMS stream with the method you run today - iodometric thiosulfate titration or ion chromatography - and reports the agreement, the working bands and the validity range on your own chemistry.
- Measured on a Spectrally X1 Raman spectrometer - 785 nm or 1064 nm laser, 8 cm⁻¹ resolution, 300-3500 cm⁻¹ range
- At-line in vials, in-line with an immersion probe, or on-site at the absorption line with a mobile unit
- Model metrics reported against your reference values, with the validity range stated
Representative process material from the absorption stream, tank or line - or existing spectra and reference datasets on ATS, KTS/CaTS or AMS.
Full-spectrum models - band integration, regression, CNN core - correlated against your reference method on your own matrix.
Spectra, band assignments, model metrics versus your reference values, and the validated model on your ATS/KTS/AMS chemistry.
The study delivers the accuracy figures and the savings case before any instrument decision, so the pilot rests on quantified fact.
Thiosulfate and sulfate are strong Raman signals.
The physics is settled before a single sample ships. Thiosulfate and sulfate are strong Raman-active oxyanions with well-defined vibrational bands, and water - the bulk of every ATS, KTS or AMS liquor - is a weak Raman scatterer, so the analyte signal reads cleanly against a quiet background.
Thiosulfate, a strong oxyanion band
The thiosulfate ion (S₂O₃²⁻) is a strong Raman scatterer with well-defined bands - the direct optical handle on thiosulfate concentration and, through solution homogeneity, on the N/S ratio that defines the product.
Sulfate at 976 cm⁻¹, measured directly
The sulfate symmetric stretch (νₛ [SO₄]²⁻) sits on a strong, isolated band near 976 cm⁻¹ - measured directly on a Gekko fertilizer study line (FS-001) and confirmed as a cleanliness handle in rinse water (FS-003). A direct read on the sulfate side and on stream quality.
Water stays out of the way
Raman runs cleanly in-line in aqueous streams: water scatters weakly, band intensity tracks concentration, and there is no sample preparation. ATS, KTS and AMS liquors are clear, low-fouling solutions that read well in-process.
Gekko classifies ATS as a direct-deploy configuration: strong analyte bands, a clear aqueous matrix and established Raman chemistry on sulfur oxyanions.
Where water defeats FT-IR by absorption, Raman reads the sulfur oxyanions directly in the aqueous stream - a result in seconds, no reagents, no sampling.
The sulfur-fertilizer niche carries little published competitor reference work; a documented inline Raman measurement on thiosulfate and sulfate is a credible technical position, stated as fact.
What an inline Raman deployment returns.
The figures below come from a deployment in a different family - phenol-formaldehyde resins, not ATS - shown as the shape of the return an inline Raman installation delivers once a model is running on the line. A European PF-resin producer runs a self-cleaning reactor probe reading phenol and formaldehyde inline, holding batch-to-batch variability below 1.5%. Your ATS feasibility study puts the equivalent numbers on your own stream.
Months to payback on the phenol-formaldehyde resin line - the fastest ROI in the Gekko portfolio.
EUR 180k in recurring annual savings on the PF-resin deployment.
Tighter reagent control from reading phenol and formaldehyde inline.
Fewer off-spec batches across the reaction, waste down 12%.
From a crate of samples to a validated model.
The sequence is the same whether the study runs in the Gekko lab or on-site at your plant with a mobile unit.
Measured against your reference method
Study samples are read in parallel on the Raman system and the method you run today - iodometric thiosulfate titration or ion chromatography. The model carries the agreement with those values, and that agreement is what the report shows.
The mode matches your process
At-line in vials for screening, an immersion probe for process-like conditions, or on-site measurement at the absorption line with a mobile unit. Once the analyzer is on the line, each result lands in 5 s.
A clear division of labor
Raman covers composition - thiosulfate concentration, N/S ratio and sulfate. Where a standard calls for trace-metal certification, that stays with ICP, and the two methods cover the dossier between them.
What lands on your desk.
Every study closes with the same set of deliverables - the validated model and the numbers to take to a pilot.
Measured spectra with band assignments, model performance against your reference values, and the result on your matrix.
A chemometric model scoped to your ATS, KTS/CaTS or AMS chemistry - full-spectrum regression, CNN core or direct band integration - with its validity range.
Where the measurement sits - immersion probe in the absorption line, tank or circulation loop - and the recommended hardware configuration for a pilot.
The concentration and matrix range the model is validated across, and the savings case quantified on your throughput.
The hardware the model runs on
A validated model transfers to the process as Spectrally X1 INLINE with the immersion Spectrally X1 PROBE and its self-cleaning module - the retract, rinse and return cycle keeps the optical window clean without interrupting measurement - and Spectrally OS turning the spectrum into thiosulfate concentration, N/S ratio and PASS/FAIL for your PLC, DCS and MES. Same chemistry, same bands, on your line, 24/7, with deployment typically 3 to 5.5 months.
Run the study on your ATS stream.
Send representative samples or R&D data from your ATS, KTS/CaTS or AMS process. We measure them against your reference method - iodometric titration or ion chromatography - build the chemometric model on your matrix and hand you the validated model, the accuracy figures and the savings case, ready to take to a pilot.