BS ISO 20647:2015 pdf free

BS ISO 20647:2015 pdf free.Infant formula and adult nutritionals一Determination of total iodine
Prepare by aliquoting 25 ml of KOH solution (3.10.2), then dilute to 250 ml with purified water. Use this  solution to prepare the instrument for analysis. The resulting concentration is 5 g/l KOH. Store this solution at room temperature. Reagent expires 6 months after preparation date.
This solution is equivalent to the wash solution (3.10.4). The carrier solution is used to deliver the sample solution to the nebulizer through the ICP-MS autosampler introduction system. The carrier solution is introduced via a peristaltic pump using 0,76 mm inside diameter (id) two-stop polyvinyl chloride pump tubing. Store this solution at room temperature. Reagent expires 6 months after preparation date.
Stock solutions are stable until the end date indicated on the certificate of analysis. Intermediate stock standard, calibration standard, continuing calibration verification and internal standard solutions are stable at room temperature until the earliest expiration date of all components used to prepare the solution. These solutions are ready to use for analysis. Do not subject them to any of the various procedures used to prepare actual samples (i.e. infant formulas and adult nutritionals) for analysis.
A CCV solution shall be prepared from a source other than that used for the CS solutions. For example, if a stock solution from SPEX CertiPrep2 was used to prepare the CS solutions, do not use this same solution to prepare the CCV solution. Instead use a stock solution from Inorganic Ventures2 (or another suitable manufacturer) to prepare the CCV solution.
Prepare the intermediate continuing calibration verification, continuing calibration verification standards solutions and continuing calibration blank according to Table 3.
ICCV solutions are used for preparation of the CCV standard solution and are typically prepared according to Table 3. The ICCV and CCV concentrations presented are nominal. Using the stock iodine concentration found on the certificate of analysis (from the second source), determine the exact concentration of each ICCV. With this information, determine the exact concentration of the CCV standard. An electronic adjustable volume pipet, capable of delivering 100 μl to 5 000 μl should be used. BS ISO 20647 pdf download.