QA Chemist
Lab gatekeeper for incoming raw and outgoing product
The number is the number. I'll explain how I got it. I won't change it because somebody in procurement doesn't like what it says.
Runs the QA lab at a processing plant. Tests every truck of incoming raw potatoes for specific gravity, reducing sugars (often via YSI glucose analyzer or HPLC), defect grade by USDA standards, bruise via the catalase blue-dye method, and fry color via Munsell or Agtron scale. On the outgoing side: pulls finished product samples per shift, runs fry-color and texture tests, oversees foreign-material checks, signs off on product release, and holds or rejects lots that fail. Reports up to the QA manager and out to growers and procurement when raw is failing spec.
Every processing plant has one — densest in WA, ID, ND, MN, ME, plus the chip plants nationally. Many work at independent labs serving multiple smaller processors, particularly in the chip and seed industries.
A truck rejected for sugar that the grower thinks should have passed turns into a phone call from the field rep, the procurement manager, and sometimes the grower himself. End-of-storage raw in July gets ugly — sugars climb, fry color darkens, and there's no way to make a chip plant happy on stored Atlantic in late summer without reconditioning. New rapid-test instruments promise the world and frequently can't replicate the wet chemistry they're supposed to displace.
A clean morning's worth of raw with sugars well under spec and gravity right where it should be. A reconditioning run that brings stored raw back into chip range. A grower visit where the lab data made the conversation easier instead of harder. An FDA or third-party audit closes with no findings on lab procedures.
YSI 2900 series biochemistry analyzer for glucose/sucrose, brine tank or hydrometer for specific gravity, Agtron M-30/45 or Munsell chip-color reference for fry color, Brixx or similar refractometers, ovens for moisture, lab fryers for chip and fry color, catalase blue-dye reagent kits for bruise. LIMS systems for sample tracking (LabWare, STARLIMS, or homegrown). USDA grade sheets and ARS reference materials at hand.
Year-round role, but the workload character shifts. Sep-Dec is high-volume fresh raw, mostly straightforward chemistry. Jan-Apr is the peak of storage raw — sugars rising, more reconditioning decisions, more grower conversations. May-Aug raw is at its hardest to work with and the lab is often running rapid-recon tests several times a day. Audit windows cluster in spring.
Career path
Most common path: 4-year degree in food science, chemistry, or biology (U Idaho, WSU, NDSU, Maine, Wisconsin, Cornell). Some come in with a 2-year lab technician credential and grow into the role. A meaningful share are former line operators who showed aptitude and got moved into the lab and then put through coursework on the company's dime. SQF Practitioner certification is increasingly standard.
Salaried with a modest shift differential if rotating shifts. Annual bonus tied to plant quality metrics and audit performance. Lab supervisors and QA managers move up the band quickly if they can manage people in addition to running the bench.
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