Can Near Infrared Spectroscopy (NIRS) Quantify The Quality of Fishmeal Circulating in Jember, Indonesia?

Abstract

The objectives of this study were to determine the range of nutrient content of fishmeal circulating in Jember Regency, East Java, and to make a calibration standard for quick calculation using NIRS by R2 and RMSECV. This study used 11 fishmeal samples from around Puger, Jember and around Muncar, Banyuwangi. The physical examination included organoleptic tests (color, odor, and texture), density, and chemical analysis of fishmeal samples. The data obtained were analyzed descriptively. The results indicated that the nutrient content of fishmeal had greatly variation. The CP content presented a quite high ranged between 26.61% to 64.30%. The result of organoleptic test showed the color was yellowish brown, brown, slightly brown to dark brown. The odor was generally standard, which was fishy. Some fishmeal samples were moist in texture, such as fishmeal samples from Jember A (22.03%) and Muncar Banyuwangi B (19.65%). The average of fishmeal density was 0.528 g/ml that ranged between 0.341-0.726 g/ml. The measurement of R2 and RMSECV calibration of fishmeal using NIRS showed good results to predict CF, DM, and EE contents. The usage of NIRS technology was recommended for proximate analysis unless ash content due to the absence of spectrum absorption for minerals.

Near infrared spectroscopy for the quality control of rice bran

“…The main mineral component found in rice husks is silica which consists up to 87% -97% [25]. These results were in line with previous studies which suggested not to measure the ash content by using NIRS due to the absence of spectrum absorption in NIR [9]. For this reason, the improvement of the model for predicting the ash content was not carried out (Table 7).…”

“…The the number, the better the RMSECV is. It indicates the accuracy of the measurement from the sample data to the calibration [9]. The result model is considered to be good if R 2 value is high and the RMSECV value is low [19].…”

“…These bonds are vibrated as certain wavelength in near infrared region when biological sample is irradiated by incident light [24]. The use of NIRS can effectively meet this need by providing a fast and accurate analysis, at a much lower cost [9]. The value of the ash despite of an inorganic component could still be detected using the NIR tool with SE of 0.308 (Table 6).…”

“…However, this process can take approximately a week. NIRS technology is developed as a non-destructive method, is able to analyze at high speed, does not cause pollution, with simple sample preparations and does not require any chemicals [9]. Near-infra red spectroscopy (NIRS), an alternative to standard chemical analytical techniques, is a quick non-invasive method to assess physical and chemical composition, reducing the cost of routine analysis [10].…”