ASTM E2454:19 pdf download

ASTM E2454:2019 pdf download.Standard Guide for Sensory Evaluation Methods to Determine the Sensory Shelf Life of Consumer Products.
6. 1 Select Criteria to Determine the End-Point—Determine the specific type of shelf life end point that will be used. There are three types of end points: (1) the product’s overall sensory profile has changed: (2) a product attribute(s) that is known or suspected to be key to the consumers’ perception of the product has changed: and (3) the acceptability of the product is too low. Company policy/objectives, marketplace conditions, business considerations, and risks all contribute to determining the type of shelf life end-point.
6.2 identify the Test Method to be Used—This is done on the basis of the chosen type of shelf life end-point criteria. Discrimination testing, descriptive, or affective testing methods are the three major test method options.
6.3 Clearly Determine the End Point—The end point is established as either a significant overall difference from the control or a significant change in the intensity of one or more critical product attribute(s) or a significant decrease in acceptability to a predetermined level of acceptance The statistical criteria for measuring significance should also be included in the end point definition (that is, a, I, and the effect size) along with the number of panelists needed at each testing interval.
6.4 Select ControI—Choose the type of control product thai will be used for the study:
6.4.1 Option 1—Stable Control—This is a typical product that is held under conditions that minimize changes over time. such as frozen or refrigerated storage or modified atmosphere. If no storage condition is known to keep changes to a minimum, this type of control cannot be used. If discrimination testing is the chosen method, this type of control is required because it is needed to conduct the test at each pull out date.
6.4.2 Option 2—Statistical Control—This is a set of numerical values obtained from sensory testing at zero time. Sensory data can be either descriptive analysis attribute ratings or acceptance scores, depending on the chosen testing method. If discrimination testing is the chosen method, this type of control cannot he used.
6.4.3 Option 3—Fresh c’ontmvl—If none of the above controls are feasible, a fresh control may he obtained at each pull out date. However, this type of control can only he used if the difference between separate batches is demonstrated to he minimal prior to the study.
6.5 Select Test Product—Choose the test product(s) for the study. The product used for the study should he representative of intended product. If a control product is used, the test products should he obtained from the same batch as the control product. If this is not feasible, various batches can be used with the added risk of variability that may obscure the differences between the control and test product. However, the test and control products should be as close in production as possible (that is, same production date, same product location, and so forth). Furthermore, at the start of the storage period, an initial sensory test should be conducted to ensure that the test and control products are in fact not different in either overall profile, specific descriptive attributes, or acceptance, depending on the chosen testing method.