scholarly journals EVALUASI MUTU KOPI ROBUSTA DI KECAMATAN KARE KABUPATEN MADIUN JAWA TIMUR

Pro Food ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 729
Author(s):  
Choiroel Anam ◽  
Eny Muzayana ◽  
Rohmat Priya Atmaja ◽  
Didik Purnomo
Keyword(s):  
Moisture Content ◽  
Microbiological Quality ◽  
Coffee Bean ◽  
Roasted Coffee ◽  
Physical Quality ◽  
Caffeine Content ◽  
Physical Chemical ◽  
Coffee Beans ◽  
Roasted Coffee Beans

ABSTRACT   Coffee is a leading commodity in Madiun Regency, East Java, the area of coffee plantations in 2018  is 1,432 Ha with an average productivity of 769.63 kg / ha /year.  This study aims to provide information on the physical, chemical, and microbiological quality characteristics of rice coffee, roasted coffee beans and evaluate the primary processing procedures for Mugi Lestari Farmer Group's coffee in Kare Village, Kare District, Madiun Regency. Evaluation of the quality of coffee rice is based on general and specific quality equirements according to SNI 01-2907: 2008. Organoleptic and chemical analysis of rice coffee and roasted coffee beans was carried out to see the state (smell, taste), moisture content, ash content, ash alkalinity, caffeine content, sugar content (reducing), insoluble solids, metal contaminants (Pb and Cu). Assessment of the physical quality of coffee beans shows that the robusta rice coffee produced at Poktan Mugi Lestari has quality according to SNI 01-2907-2008, especially for the parameters of the presence of insects, moisture content, impurities, and no found odor/mold.  Physical quality of roasted coffee beans from Poktan Mugi Lestari when compared to SNI standards has a normal condition, both in terms of smell, taste, and appearance. Chemical parameters of roasted coffee bean samples are also in accordance with the general requirements for roasted coffee (SNI 01-2983-1992). The number of bacteria and molds is less than the maximum limit set. Assessment of physical, chemical, and microbiological quality of packaged coffee powder has a value in accordance with the SNI quality requirements, both for caffeine content, the amount of mold, and bacteria (ALT value), and water content. The primary coffee processing process at Poktan Mugi Lestari has been able to produce rice coffee in accordance with SNI requirements.   Keywords: coffee, robusta, quality, kare madiun   ABSTRAK               Kopi merupakan komoditas unggulan di Kabupaten madiun Jawa Timur, Luas areal perkebunan kopi tahun 2018 di Kabupaten Madiun  1.432 Ha dengan produktivitas rata rata 769,63 kg/ha/tahun. Penelitian ini bertujuan memberikan informasi karakteristik mutu fisik, kimiawi, dan mikrobiologis dari kopi beras, kopi biji sangrai dan mengevaluasi prosedur pengolahan primer kopi Kelompok Tani Mugi Lestari di desa Kare, Kecamatan Kare, Kab Madiun, agar dihasilkan produk dengan mutu yang baik. Evaluasi mutu kopi beras didasarkan pada syarat mutu umum dan khusus sesuai SNI 01-2907:2008. Analisa organoleptik dan kimiawi kopi beras dan kopi biji sangrai dilakukan untuk melihat keadaan (bau, rasa), kadar air, kadar abu, kealkalian abu, kadar kafein, kadar gula (pereduksi), padatan tak larut dalam air, cemaran logam (Pb dan Cu). Penilaian mutu fisik biji kopi diketahui bahwa kopi beras robusta yang dihasilkan di Poktan Mugi Lestari memiliki mutu sesuai dengan SNI 01-2907-2008, khususnya untuk parameter keberadaan serangga, nilai kadar air, pengotor, dan tidak ditemukannya bau busuk/kapang. Keadaan mutu fisik biji kopi sangrai dari Poktan Mugi Lestari jika dibandingan dengan SNI 01-2983-1992 memiliki keadaan yang normal, baik dalam hal bau, rasa, dan penampakan. Parameter kimiawi biji kopi sangrai dalam penelitian juga sesuai dengan syarat umum kopi sangrai (SNI 01-2983-1992). Jumlah bakteri dan kapang kurang dari batas maksimum yang ditetapkan. Penilaian mutu fisik, kimiawi, dan mikrobiologis bubuk kopi yang dikemas memiliki nilai sesuai dengan persyaratan mutu SNI, baik untuk kadar kafein, jumlah kapang, dan bakteri (nilai ALT), dan kadar air. Proses pengolahan primer kopi di Poktan Mugi Lestari sudah mampu menghasilkan kopi beras yang sesuai dengan persyaratan SNI.     Kata kunci: Kopi, Robusta, Mutu, Kare Madiun

scholarly journals Optimization of Coffee Liqueur Manufacturing Process using Caffeine Content

2019 ◽  
Vol 9 (1) ◽  
pp. 430-433
Keyword(s):  
Alcoholic Beverage ◽  
The Other ◽  
Coffee Bean ◽  
Roasted Coffee ◽  
Caffeine Concentration ◽  
Caffeine Content ◽  
Other Hand ◽  
Coffee Beans ◽  
Roasted Coffee Beans

Coffee liqueur is an alcoholic beverage made by soaking coffee in spirit. Though coffee liqueur is one of the wellknown liqueur, few research was made so far. In this research, coffee liqueur was prepared by using different recipes involving liquors with different ethanol concentrations (20, 40, or 80%), and the soaking periods (14, 21, or 30 days) of the coffee liqueur ingredients (roasted coffee beans, coffee bean powder and other ingredients). Volatile and semi-volatile compounds are important for the organoleptic quality of roasted coffee beans. However, the amounts of these compounds in roasted coffee beans are more dependent on roasting conditions than those of non-volatiles. Furthermore, volatiles are more easily lost during storage. On the other hand, caffeine, a well-known compound of coffee is an intrinsic non-volatile chemical, and the caffeine is present in larger than other potential indicator components in coffee beans, ensuring the quantitative consistency of the coffee extracts in the liqueur. Caffeine was quantified from the prepared coffee liqueurs by HPLC after method validation. The average caffeine content of all 54 analyses (6 analyses per sample) was 2081.2 μg/mL. The highest caffeine concentration 2793 μg/mL was acquired in the sample prepared by 80% ethanol liquor. A soaking period of 14 days, was considered inadequate for sufficient caffeine extraction regardless of liquor alcohol content. Caffeine concentration peaked after soaking coffees and other ingredients for 21 days at 80% ethanol concentration. On the other hand, the most consistent caffeine concentrations in liqueurs were obtained by soaking for 21 days in 40% ethanol (RSD 7.8%), thus it could be the optimum coffee liqueur recipe. The consistency of coffee liqueur quality was assured using caffeine content.

scholarly journals Kajian Mutu Kopi Arabika Gayo Dengan Perlakuan Variasi Suhu dan Lama Penyangraian

2017 ◽  
Vol 2 (2) ◽  
pp. 416-422
Author(s):  
Kaswindi Kaswindi ◽  
Bambang Sukarno Putra ◽  
Rita Khathir
Keyword(s):  
Moisture Content ◽  
Coffee Bean ◽  
Arabica Coffee ◽  
Caffeine Content ◽  
Randomized Design ◽  
Coffee Beans ◽  
Roasting Process ◽  
Postharvest Handling ◽  
The Impact

Abstrak. Mutu kopi arabika gayo sangat tergantung pada proses penanganan pasca panen, terutama proses penyangraian. Tujuan penelitian ini untuk mengetahui pengaruh suhu dan lama penyangraian terhadap mutu kopi arabika gayo. Penelitian ini menggunakan biji kopi arabika gayo dari Desa Buntul Kemumu. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan variasi suhu 160, 170 dan 180˚C dengan lama penyangraian  15, 20, dan 25 menit. Parameter penelitian meliputi rendemen, kadar air, keasaman (pH), kafein dan uji organoleptik terhadap warna, aroma dan rasa oleh 25 orang panelis. Data dianalisis menggunakan analisis sidik ragam (ANOVA) dengan uji lanjut Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian ini menunjukan bahwa rendemen, kadar air, dan keasaman kopi arabika gayo dipengaruh secara nyata oleh suhu dan lama penyangraian. Rendemen tertinggi diperoleh pada suhu 160℃ dan lama penyangraian 15 menit yaitu 85,2%. Kadar air pada kopi arabika gayo memenuhi standar SNI yaitu maksimal 7%, kecuali pada perlakuan suhu 160˚C dan lama penyangraian 15 menit yaitu 7,14% . Keasaman (pH) tertinggi diperoleh pada suhu 160˚C lama penyangraian 15 menit yaitu 4,95. Kadar kafein kopi arabika gayo meningkat semakin tinggi suhu dan lama penyangraian. Berdasarkan uji organoleptik menunjukan bahwa kopi arabika gayo yang paling disukai panelis diperoleh suhu penyangraian 170 dan 180˚C dengan lama penyangraian 25 menit.Study of Arabica Gayo Coffee Quality under Temperature and Roasting Duration TreatmentsAbstract. The quality of gayo arabica coffee was affected by postharvest handling especially roasting process. This study aimed to find out the impact of temperature and roasting duration against the quality of gayo arabica coffee.The study was conducted by using Factorial Completely Randomized Design i.e. roasting temperature at 3 levels namely 160, 170 and 180℃, and roasting durations at 3 levels namely 15, 20, and 25 minutes. The coffee beans from Buntul Kemumu Village was evaluated in this study. Parameters analysed were yield, moisture content, acidity, caffeine content and 25 respondent perceptions on colour, aroma and taste. Data were analysed by using analysis of variance (ANOVA) and honestly significance difference at probability 5%. The results showed that the yield, moisture content, and acidity of gayo arabica coffee bean were influenced by temperature and roasting duration. The highest yield was obtained at treatment 160℃ temperature for 15 minutes roasting, i.e 85.2%. The mositure content of gayo arabica coffee beans followed the SNI qualification, i.e. 7%, unless at treatment 160℃ temperature for 15 minutes roasting, i.e. 7.14%. The highest acidity (pH) was obtained from treatment 160℃ temperature for 15 minutes roasting, i.e. 4.95. The caffeine content increased as temperature and roasting duration increased. Respondent perceptions showed that the best quality of gayo arabica coffee was obtained from treatment 170 and 180℃ temperature for 25 minutes roasting.

scholarly journals Use of colour parameters for roasted coffee assessment

2012 ◽  
Vol 32 (3) ◽  
pp. 436-442 ◽  
Author(s):  
Natalina Cavaco Bicho ◽  
António Eduardo Leitão ◽  
José Cochicho Ramalho ◽  
Fernando Cebola Lidon
Keyword(s):  
Ether Extract ◽  
Roasted Coffee ◽  
Robusta Coffee ◽  
Coffee Beans ◽  
Colour Parameters ◽  
Colour Changes ◽  
Technological Quality ◽  
Non Destructive ◽  
Roasted Coffee Beans

Fast and non-destructive indicators were evaluated as tools to measure the technological quality of Arabica and Robusta coffee. Accordingly, considering the roasting intensity in highly valuable commercial samples, volume, mass, apparent density, moisture, total ash, ash insoluble in hydrochloric acid, and ether extract were characterized. The chromatic parameters L*, C*, Hº were measured using illuminants D65 and C. It was found that in roasted coffee beans, the parameters L*, C*, Hº, and coordinate b* had an antagonist interaction due to an increase in the roasting intensity, whereas after milling, only L* and Hº decreased progressively. Considering that the parameters L* and Hº followed similar patterns using both illuminants, D65 and C, it can be concluded that they are appropriate to evaluate coffee colour changes during roasting, enabling a relationship with coffee quality.

scholarly journals SENSORY QUALITY OF ROASTED COFFEE BEANS UNDER DIFFERENT STORAGE CONDITIONS

2019 ◽  
Vol 14 (4) ◽  
pp. 509
Author(s):  
Denis Henrique Silva Nadaleti ◽  
Hully Alves Rocha ◽  
Luciana Maria Vieira Lopes Mendonça ◽  
José Marcos Angélico de Mendonça ◽  
Iêda Bruna dos Reis ◽  
...  
Keyword(s):  
Storage Time ◽  
Sensory Quality ◽  
Storage Conditions ◽  
Roasted Coffee ◽  
Coffee Beans ◽  
And Storage ◽  
Zero Time ◽  
Roasted Coffee Beans ◽  
Storage Temperatures

Roasted coffee is subject to loss of quality due to aging, and the intensity of these losses is influenced by packaging. The objective in this study was to evaluate the possible losses in the sensory quality of a specialty roasted coffee, stored in beans for 150 days in different packages and storage temperatures. The experiment was carried out in the Coffee Classification and Industrialization Laboratories of IFSULDEMINAS Campus Muzambinho. The coffee was roasted and after 48 hours it was packed in three different packages and kept stored at room temperature and refrigerated at 18ºC ± 1ºC for 150 days, with evaluations every 50 days, starting from zero time. The experimental design used was entirely randomized with 3 repetitions. Sensory evaluation was performed by three Q-Grader judges, according to the SCAA protocol. The data were evaluated using the SISVAR software, and when significance between treatments was detected, the regression and Scott-Knott tests were applied at the 5% probability level. The packaging used for storage did not interfere in the quality of the coffee. There was an interaction between temperature and storage time for the sensory attribute “body”. The quality decreased linearly with the storage time, from 86 to 80 points, to 84 days of storage.

scholarly journals Sensory Attributes of Cold Brew Coffee Products at Various Resting Time After Roasting Process

2019 ◽  
Vol 35 (1) ◽  
pp. 42-50
Author(s):  
Nabiilah Salmaa Dwiranti ◽  
Ardiansyah Ardiansyah ◽  
Nurul Asiah
Keyword(s):  
Control Sample ◽  
Sensory Attributes ◽  
Sensory Characteristics ◽  
Roasted Coffee ◽  
Multiple Factor Analysis ◽  
Projective Mapping ◽  
Coffee Beans ◽  
Resting Time ◽  
Roasted Coffee Beans

The quality of the brewed coffee depends on various factors. Resting time of roasted coffee beans is one of the processes that can affect the sensory charac- teristics of coffee brew. During resting the reduction of CO2 gas level may change and give significan effect on sensory quality of coffee. This study aims to determine the dominant sensory characteristics that can be used as quality parameters of cold brew coffee products at various resting times after roasting. The cold brew coffee product was brewed from roasted Arabica coffee beans with various resting time (0, 1, 3, 5, 7, and 9 days). Projective Mapping (Napping) sensory analysis method was used in this study. The samples were tested by 75 untrained panelists (naive panelists). Multiple Factor Analysis was used to obtain the cold brew coffee sample position configuration. The results of the analysis showed that panelists were able to differen- tiate the characteristic of sensory attributes each sample. The aroma and flavor are the main attributes that can differentiate the characteristics of each sample. From the napping method, the results obtained in the form of individual factor map and preference mapping showed that the sample resting time 1 and 3 days after roasting were assessed by the panelists as closest to the control sample (0 days). In summary, the resting time treatment of roasted coffee beans have a significant effect on the sensory characteristics of cold brew coffee products. This is proofed by changes of aroma, flavor, and aftertaste during certain period of resting time.

scholarly journals Modeling sorption isotherms and isosteric heat of sorption of roasted coffee beans

2018 ◽  
Author(s):  
Gentil Andres Collazos-Escobar ◽  
Nelson Gutiérrez-Guzmán ◽  
Henry Alexander Vaquiro-Herrera ◽  
Erika Tatiana Cortes-Macias
Keyword(s):  
Moisture Content ◽  
Equilibrium Moisture Content ◽  
Sorption Isotherms ◽  
Isosteric Heat ◽  
Dew Point ◽  
Roasted Coffee ◽  
Sorption Data ◽  
Heat Of Sorption ◽  
Coffee Beans ◽  
Roasted Coffee Beans

The aim of this work was determine the sorption isotherms in roasted beans of specialty coffee at temperatures of 25, 30 and 40 °C and water activities between 0.1 and 0.8 using the dynamic dew point method. The experimental sorption data were modeled using 12 different equations to represent the dependence of equilibrium moisture content with aw and temperature. The net isosteric heat of sorption was determined from the experimental sorption data using the Clausius-Clapeyron equation. The Weibull model satisfactorily modeled the effect of the temperature on the hygroscopic equilibrium in roasted coffee beans (R2adj =0.902 and RMSE = 0.00550 kg·kg-1d.b.). The net isosteric heat of sorption increase with increased moisture content. Keywords: water activity; sorption properties; equilibrium moisture content; hygroscopicity

scholarly journals Skrining Fitokimia dan Uji Antioksidan Ekstrak Biji Kopi Sangrai Jenis Arabika (Coffea arabica) Asal Wamena dan Moanemani, Papua

2019 ◽  
Vol 11 (2) ◽  
pp. 103-109
Author(s):  
Septiani Mangiwa ◽  
Agnes Eri Maryuni
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Phytochemical Analysis ◽  
Coffee Bean ◽  
Roasted Coffee ◽  
Phytochemical Content ◽  
Phytochemical Investigation ◽  
Coffee Beans ◽  
Dpph Method ◽  
Roasted Coffee Beans

Coffee bean are rich of secondary metabolits that able to inhibit free radical compounds. This antioxidant activity may reduce many diseases correlated with it. The aims of this study were to determined the phytochemical content and antioxidant activity of roasted coffee bean from Wamena and Moenemani regency, Papua. Roasted coffee beans were extracted by maceration for 24 hr with methanol. Harborne standard method was used for the phytochemical analysis  and DPPH assay was used to  determine the antioxidant activity. IC50 was measured by spectrophotometric assay using spectrophotometer Uv-Vis at 517 nm wavelenghth. Result showed that both Arabica roasted coffee beans from Wamena and Moanemany had the capacity to inhibit free radical  at 61,71% and 69,7% with IC50 at  107,97 and 100,91 ppm, respectively . Phytochemical investigation revealed that the bioactive compounds from Moanemani and Wamena coffee beans were similar, which composed of alkaloids, flavonoids, terpenoids, saponins, and tanins. In conclusion, the methanolic extract of roasted Arabica coffee beans from Wamena and Moanemani can be used as the source of natural antioxidant.Keywords: Arabica roasted coffee beans; phytochemical; antioxidant; DPPH method.

scholarly journals Physical and Cup Quality Attributes of Arabica Coffee (Coffea arabica L.) Varieties Grown in Highlands of Amhara Region, Northwestern Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Melese Wale Mengistu ◽  
Melkamu Alemayehu Workie ◽  
Abrar Sualeh Mohammed
Keyword(s):  
Agricultural Research ◽  
Quality Parameters ◽  
Coffee Bean ◽  
Amhara Region ◽  
Physical Quality ◽  
Arabica Coffee ◽  
Coffee Beans ◽  
Bean Weight ◽  
Cup Quality

Coffee is the second most traded commodity worldwide after oil both in terms of volume and value. The study was therefore initiated to evaluate the quality of highland coffee varieties grown in the region. For this purpose, coffee bean samples of the varieties Merdacheriko, Yachi, Wush Wush, Buno wash, 741, 7440, Ababuna, and Ageze were collected from trees which were grown in Adet and Woramit Agricultural Research Centers in RCBD with three replications. Physical (length and width of coffee beans, 100 bean weight, screen sizes, and raw quality) and cup quality (aromatic intensity, aromatic quality, acidity, astringency, bitterness, body, flavor, overall standard, and total cup quality) parameters, as well as total coffee quality, were evaluated by a team of certified panelists at Jimma Agricultural Research Center. The results depicted significant variations in physical quality parameters of coffee varieties, while the cup and total qualities of coffee varieties in WARC and in AARC were similar. In WARC, Buno wash, Wush Wush, and Ababuna coffee varieties showed better physical quality in terms of 100 bean weight, bean length, bean width, and screen size, while varieties Buno wash and Wush Wush showed better physical quality only in terms of 100 bean weight and bean length in AARC. Cup quality of coffee varieties grown in WARC ranged from 48.16% to 51.33% while that of coffees grown in AARC ranged from 45.00% to 50.83%. Total coffee quality in WARC was at the range from 85.50 to 89.33% while in AARC from 81.66 to 87.83%, which is within the standard of Ethiopian Commodity Exchange for coffee. All the tested varieties of Arabica coffee can be therefore used to produce coffee in both study areas and areas with similar agroecology of the Amhara Region, Ethiopia. Further research on the yield performance of the coffee varieties is also recommended.

scholarly journals Analysis of Volatile Compounds in Coffee Prepared by Various Brewing and Roasting Methods

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1347
Author(s):  
Ja-Myung Yu ◽  
Mingi Chu ◽  
Hyunbeen Park ◽  
Jooyeon Park ◽  
Kwang-Geun Lee
Keyword(s):  
Volatile Compounds ◽  
Extraction Methods ◽  
Measured Signal ◽  
Roasted Coffee ◽  
Green Coffee Beans ◽  
Coffee Beans ◽  
Espresso Coffee ◽  
Roasting Temperature ◽  
Roasted Coffee Beans ◽  
Significant Factors

Volatile compounds of coffee brewed under various roasting conditions and by different brewing methods were analyzed. Green coffee beans (Coffea arabica) were roasted at 235 °C for 13 min, 240 °C for 15 min, and 245 °C for 17 min. Roasted coffee beans were ground into particles of three different sizes (710, 500, and 355 μm) and brewed by an espresso coffee machine and the cold brew method. Three types of water (filtered, tap, and bottled) were used for coffee extraction. SPME-GC-MS results indicated that increasing the roasting temperature and time increased the levels of 2,2′-methylene-bis-furan, guaiacol, and 4-ethylguaiacol (p < 0.05) and decreased the levels of furfural (p < 0.05). Grind size was inversely proportional to the measured signal of volatiles by GC-MS (p < 0.05). The measured GC/MS intensities of 2-methylpyrazine, 2,5-dimethylpyrazine, and 2-methoxy-4-vinylphenol were significantly higher in coffee brewed with filtered water (p < 0.05) than tap and bottled water. 2-Methylpyrazine, 1-methylpyrrole, and 2-acetylfuran were the most abundant components in the cold brew. Overall, roasting conditions and extraction methods were determined to be significant factors for volatile compounds in coffee. This is the first study showing the analysis of volatile compounds in coffee according to various types of water and extraction methods, such as espresso and cold brew coffee.

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