I have to evaluate yoghurt samples for six characters (i.e. Color, Appearance, Odour, Taste, Texture and Overall acceptability) using a 5 point hedonic scale. Can I use 5 samples at a time?
Hello Sachini,
you can do it for 5 samples at one time, there is no problem.
but for appropriate analysis, the judge have to drink some water between sample and another to refresh the sense of mouth.
good luck
hi, maximum 5 numbers of samples can be properly judged by any panelist, after that discrimination among the samples will generate.
Hello, using 5 samples is appropriate, but I will also suggest that the samples be presented in duplicates and numbered randomly, and not presented in a way that the same samples will be presented one after the other this will help to reduce variability in the result.
For Olive Oil sensory assessment, according to the IOC Method in force, an Official Panel Group can taste between 10 to 12 a.m., no more that 4 samples per session.
Session is a set of 4 samples. The following session must start no earlier than 15 min later the end of the latter one.
Thank you very much Ebrahim Elkhtab, Adil Hussain, Rajendra Singh Thakur, Bolanle Otegbayo and Mauro Amelio for sharing your valuable ideas and knowledge. Thanks again!
Hello,
Totally agree with colleagues, more than 05 samples per test is required.
Sachini Jayawardana.
For sensory analysis of food product, there are at least 7 panelists comprising of different groups of society should be included to check the acceptability of the product.
Maximum allowed is 5 samples but it should be one character at a time
Thank you very much Dr. Vallabh Chandegara, Thaís Paes Rodrigues dos Santos, Tayo N. Fagbemi and Dilmi Abdelkader for sharing your valuable ideas and knowledge!
A reasonable number of samples, 2- 4 ,should be tested at a time to avoid taste fatigue. Read the attached file.
Best regards
Esam H. Mansour
Agreed...not exceed 5 samples in a row. However, there still a gap between sample 30-60secs tested and subjects must rinse their mouth with water / plain cracker to avoid carry over / adaptation effect. If you have more than 5. You can separate it with a longer time(gap) before continue with another set (let say another 5 samples) or you can consider to have seperated sessions if you have too many samples to be tested. Gudluck.
Number sample to be tested in sensory evaluation should be carried out based on the nature of sample, efficiency of respondent , number of samples and time between two samples . Sensory panelist should not be exhausted during evaluation either you take 5 point hedonic scale or 9- point hedonic scale.
Dear Peter Howgate
Exhausted means panelist give similar test result. If you test the sample in fresh mood then correct test result is found. In my opinion, sufficient time between two sample test should be given to avoid similar trends of result.
Thank you very much Esam H. Mansour for sharing a valuable document!
Thank you Jatinder Pal Singh, Ammat Duew, Peter Howgate and Dr. Vallabh Chandegara for sharing your valuable ideas and knowledge!
If the temperature is one of the factor could affect to the quality of your samples , so you should plan the number of samples without the effect from that factor.
5 sample are suitable for sensory testing. but as per lot, you can decrease or increase your sample.
like you can use 5 samples on every hour.
or lot is very short then you can go root n+1 samples.