Method validation of sodium dodecylbenzene sulfonate (SDBS) analysis in catfish by maceration and UV-Vis spectrophotometry using methylene blue active substances (MBAS) method was performed. The first stage of this research was method validation comprising correlation coefficient, sensitivity, Limit of Detection (LOD), Limit of Quantitation (LOQ), precision, and accuracy. The extraction of SDBS by maceration with methanol for 16 h and analysis by UV-Vis spectrophotometry using MBAS were performed. Then, this method was applied to analyze SDBS in catfish. The results of validation of SDBS analysis in cultivated catfish give correlation coefficient 0.9944, sensitivity 10.57 × 104 L mol-1 cm-1, LOD 0.01776 mg/L, LOQ 0.05922 mg/L, precision 0.1351-1.300 %, and accuracy 87.64-90.01 %, respectively. The SDBS concentrations in fish increase with the increase in the SDBS concentration in cultivating water. Bioconcentration Factor (BCF) values were inversely proportional to the concentration of SDBS in the cultivating water. The concentrations of SDBS on catfish, tilapia, and carp in traditional markets were 5.719-8.162; 5.180-6.548; and 2.973-5.874 mg/kg, respectively. In general, analysis method of SDBS in catfish by maceration and UV-Vis spectrophotometry with MBAS show a good result and can be used as a routine analysis in fish.
Abstrack: Penelitian bertujuan menemukan makna, hubungan, sejarah dan latar belakang terciptanya sajak-sajak Irianto Ibrahim. Metode penelitian ini adalah deskriptif kualitatif. Sajak-sajak Irianto Ibrahim dalam Situs Kesedihan yaitu Sajak Pada Suatu Hari, Sajak Percakapan Selepas Hujan, dan Sajak Yang Berakhir dengan Pertanyaan. Sajak-sajak yang ditulis pada Januari tahun 2019 ini terbagi dalam tiga judul. Namun dilihat dari alur waktu, ketiganya saling terhubung serta melengkapi. Terdapat rentetan cerita yang coba dilanjutkan kembali pada sajak-sajak selanjutnya, mengandung bahasa kiasan dan tanda-tanda menggunakan konotasi dari alam yang menarik untuk ditinjau maknanya. Aspek tersebut dianaliasis dari data berupa buku antologi puisi Situs Kesedihan rangkaian Toni Lesmana menggunakan pendekatan semiotik Riffaterre. Tujuannya untuk mengungkap makna sajak-sajak Irianto Ibrahin dalam Situs Kesedihan. Hasil analisis menunjukan bahwa dalam sajak Pada Suatu Hari, sajak Percakapan Selepas Hujan, dan sajak Yang Berakhir dengan Pertanyaan karya Irianto Ibrahim memiliki makna yang kompleks dan saling berhubungan satu sama lain. Hal tersebut dapat dilihat pada rangkain pencarian makna yang dilakukan menggunakan semiotik Riffaterre. Kata Kunci: Irianto Ibrahim; Makna Sajak; Semiotik Riffaterre; Situs Kesedihan
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