NIR Spectroscopy: Where It Fits in Grain, Feed, and Food Operations Learn where NIR spectroscopy fits in grain, feed, and food operations — and where it fails. Covers starch, drift, calibration transfer, and outlier detection. <p>A feed mill was reporting corn protein at 8.9% for three straight months. Same supplier, same variety — everything looked consistent. Then a routine Kjeldahl check came back at 8.1%. That 0.8% gap had been quietly skewing least-cost formulation for an entire quarter. The NIR instrument wasn't broken. It was running outside its valid calibration range, and no protocol existed to catch it. That's the kind of problem that doesn't announce itself until it's already expensive.</p> <p>NIR spectroscopy is fast, non-destructive, and reliable — within limits your QA team needs to understand before trusting the data. The most common NIR problems I see at grain processors, feed mills, and dairy operations aren't instrument failures. They're situations where the technique was trusted outside its valid range, and nobody caught it in time. This article covers the four NIR limitations that come up most often — and lays out a practical approach for knowing when to run a complementary reference method.</p> <p>The NIR region spans roughly 780 nm to 2500 nm. That's where molecular overtone and combination vibrations occur. Those vibrations are the analytical basis that makes moisture, protein, fat, and starch prediction possible without wet chemistry.</p> <h2>NIR Limitations in Food and Feed Operations: When to Run a Reference Check</h2> <h2>How NIR Spectroscopy Works</h2> ← Back to NIR Spectroscopy Blog