Tag: grain quality control

How to Extend the Life of Your Laboratory Equipment

Laboratory instruments are a significant capital investment — whether purchased new or as verified pre-owned units. With proper maintenance, leading instruments from manufacturers such as Perten, Bastak, Chopin, and Carbolite can provide accurate, reliable service for 15–20 years or more. Neglect, by contrast, accelerates wear and leads to costly breakdowns at the worst possible moments. Follow the Manufacturer’s Maintenance Schedule Every instrument comes with a recommended maintenance schedule covering cleaning intervals, lubrication points, consumable replacement, and periodic calibration. These schedules are not suggestions — they are the result of engineering analysis of failure modes. Document every maintenance action in a log book alongside the date, operator, and any observations. Control the Laboratory Environment Temperature and humidity fluctuations are silent destroyers of precision laboratory equipment. Electronic components, optical systems, and mechanical bearings all degrade faster under variable environmental conditions. Aim to maintain your laboratory at a constant 20°C ± 2°C and relative humidity between 50% and 60%. This is especially important for balances, NIR instruments, and polarimeters. Use the Right Consumables The temptation to substitute cheaper generic consumables for manufacturer-specified parts is understandable but frequently costly. For Falling Number instruments, for example, off-specification viscometer tubes alter the fluid dynamics of the test and produce systematically biased results — invalidating all data generated until the error is identified. Always use manufacturer-approved consumables or verified equivalents. Train Your Operators The majority of instrument damage in flour laboratories is caused not by mechanical failure but by operator error. Overloading balances, using incorrect cleaning solvents on optical surfaces, failing to allow warm-up time, and mishandling glassware are all preventable causes of instrument damage. Invest in thorough initial training and refresher sessions when procedures or personnel change. Address Issues Promptly An unusual reading, an unfamiliar noise, or a slower-than-normal response are all early warning signs that something is developing. Addressing these signals promptly — by consulting the service manual, contacting the manufacturer, or engaging a specialist — almost always results in a simpler and cheaper repair than waiting until the instrument fails completely.

A Guide to Moisture Measurement in Grain and Cereal Products

Moisture content is arguably the single most important quality parameter in the storage and trade of grain and cereal products. Too high, and grain becomes vulnerable to mould growth, mycotoxin development, and heat damage during storage. Too low, and the seller loses weight — and therefore revenue — on every tonne traded. Precise moisture measurement is not optional; it is a commercial and food safety necessity. Reference Method: Oven Drying The internationally recognised reference method for grain moisture measurement is oven drying (ISO 712 / ICC 110). A weighed sample is dried at 130°C for two hours. The weight loss expressed as a percentage of the original weight gives the moisture content. While highly accurate, the method is slow — making it unsuitable for rapid intake decisions at a grain elevator receiving hundreds of loads per day. Rapid Methods: Capacitance and Resistance Meters Dielectric (capacitance-based) moisture meters — such as the Dickey-John GAC series — measure moisture by passing an electrical field through the grain sample and correlating its dielectric properties with moisture content. Results in under a minute make these instruments ideal for rapid intake screening. They require regular calibration against the reference oven drying method for each grain type. NIR for Moisture Near-Infrared analysers can also provide rapid moisture readings alongside protein and other parameters, though they are typically less precise than dedicated dielectric meters for on-the-spot intake decisions. NIR moisture measurement excels in controlled milling and processing environments where speed and multi-parameter output are both valuable. Temperature Compensation A frequently overlooked factor in moisture measurement accuracy is sample temperature. Most rapid moisture meters require temperature compensation — measuring the grain temperature and applying a correction factor — because dielectric properties change with temperature. Cold grain arriving at intake from outdoor storage in winter can give systematically low moisture readings if temperature compensation is disabled or incorrectly applied. Fuhler Labor stocks verified pre-owned Dickey-John GAC moisture analysers and Axis laboratory balances for moisture verification — essential tools for any grain intake or processing operation.

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