Quality assurance at implementation of internal control in research laboratory center

The article considers control procedures for frequency, internal precision and flaws. To ensure quality in the implementation of internal control the results of control procedures to determine lead in samples of food raw materials and food products are given. Functioning system of quality testing laboratory center with the approved complex of regular activities for the implementation of internal quality control ensures reliable recognition results of its activities. Internal control helps to ensure the accuracy of measurement results, the accuracy of information about the quality of the analyzed products, quality control measurements. To ensure quality in the implementation of internal control schedule of construction and verification of selection characteristics includes a control method by supplement, breeding, as well as the use of a sample to control. The quality of implementation of internal control procedures is also provided by the monitoring of conditions of the test: recording of temperature, humidity, voltage, temperature in the refrigerator when stored chemical reagents and solutions. In the course of research control over the timing of the preparation of reagents and titrated solutions, expire date of dry reagents, state standard samples is carried out; monitoring and actualization of normative documentation are also conducted; and state verification of measuring instruments used in the study is performed. To ensure quality in the implementation of internal control special procedures based on a defined element, like lead is conducted. The resulting graph of lead in food products and food raw materials in accordance with State Standard (GOST) 30178-96 “Raw materials and food products. Atomic absorption method for determination of toxic elements”, with a range of defined concentrations of 0.01 to 2.0 mg/cm3, the accuracy of calibration characteristics amounted to 2.8 %, is shown.