What testing methodology does Nestlé use?
The analysis of minerals in foods, including macronutrients / micronutrients, trace elements and heavy metals, is a special type that requires a strong scientific background and knowledge of mineral and analytical chemistry, and skill.
To test for heavy metals (such as cadmium, lead, arsenic etc.) we use a method called “ICP-MS” (Inductively Coupled Plasma Mass Spectrometry) – one of the most reliable means of measuring trace elements such as lead reliably in a wide range of food products.
It measures the levels of trace elements like heavy metals in “parts per billion” (for reference, the standard limit in India for most products is in the “parts per million” range). This technique, a robust fit for purpose, internationally recognised method verified as per ISO 17025, is Nestlé’s official reference method for the quantitative determination of ten trace elements. It requires a highly qualified personnel to carefully follow the different steps of the method for each analysis while controlling the different critical parameters needed to deliver accurate results.
|Steps||Key Control Points|
|1. Clean laboratory environment and labware||
|2. Sampling and preparation of test samples||
|3. Pressure digestion||
|4. Preparation of the test solutions||
|5. Equipment instrument set-up||
|6. Calculations and expressions of results and internal control plan||