Abstrak: Limbah bahan kimia baik sisa praktikum maupun bahan kedaluarsa di Laboratorium Kimia PMIPA FKIP Universitas Mataram perlu dikaji secara mendalam, sehingga dapat ditemukan solusi bagaimana cara pengelolaan yang tepat. Untuk menemukan formula pengelolaan yang tepat diperlukan pengkajian tentang: identifikasi penyebab timbulnya limbah bahan kimia, perhitungan jumlah limbah, mekanisme pengolahan dan pembuangan ke lingkungan. Kuantitas limbah bahan kimia dan teknik pengelolaannya menjadi indikator seberapa baik tata kelola limbah. Tujuannya adalah untuk menemukan solusi dalam pengelolaan limbah bahan kimia, sehingga dapat dijadikan dasar/pedoman dalam upaya minimalisasi potensi limbah baik pada penanganan di gudang maupun pengurangan kuantitas limbah yang dihasilkan dari kegiatan praktikum di laboratorium PMIPA FKIP Universitas Mataram. Teknik dokumentasi yang digunakan dalam pengelolaan dapat diperoleh beberapa hal, yaitu: (1) limbah bahan kimia berasal dari sisa pembuatan larutan, sisa praktikum, hasil pencucian alat, dan bahan kedaluarsa. (2). Penurunan jumlah bahan kimia yang disimpan di gudang sebesar 18,5 % dari total persediaan, sedangkan jumlah bahan penyebab limbah B3 berkurang 29%. (3) Diperlukan teknik pengolahan limbah bahan kimia tersebut sebelum dibuang ke lingkungan. (4) Rekomendasi usulan amandemen S.O.P Perencanaan, Penerimaan Bahan, Audit Gudang sehingga pencegahan pencemaran bahan kimia. Kata kunci : Bahan kimia, Pengelolaan limbah, MSDS, Incompatibility, StandardOperating Procedure (S.O.P) Abstract: Hazardous chemicals and materials practicum good rest expiry Chemistry Laboratory, University of Mataram PMIPA FKIP needs to be studied in depth, so as to find solutions on how to appropriate management. To find the right formula management studies are necessary regarding: the identification of the causes of chemical wastes, the calculation of the amount of waste, treatment and disposal mechanisms to the environment. The quantity of chemicals and waste management techniques to be an indicator of how well the governance of waste. The goal is to find a solution in the management of chemical waste, so it can be used as the basis / guidelines in an effort to minimize the potential for waste both in handling in the warehouse as well as a reduction in the quantity of waste generated from laboratory experiments PMIPA FKIP University of Mataram. Techniques used in the management of documentation may be obtained several ways, namely: (1) chemical wastes coming from the rest of the preparation of the solution, the rest of the lab, the results of the washing apparatus, and outdated materials. (2). Decrease the amount of chemicals stored in the warehouses of 18.5% of the total inventory, while the amount of material cause of the B3 waste is reduced by 29%. (3) Required waste processing techniques such chemicals before being discharged into the environment. (4) Recommendations proposed amendments S.O.P Planning, Reception Materials, Audit Vault so that the prevention of chemical contamination. Keywords

In the synthesis of the organic sensor, the molecular structure will affect the ability of a compound to be used as a colorimetric chemosensor. Here, we present a simple synthesis technique for 5-nitrovanillin. It has been successfully synthesized using nitric acid as a source of nitro groups. Dichloromethane DCM was used as a solvent, and the synthesis was carried out at low temperatures (under 5°C). The method produces a good yield. The nitro group attached to the structure of the chemosensor plays a role in prolonging the electron delocalization. Its effect is in the process of anion recognition by the chemosensor. The formation of a sensor-analyte complex between the chemosensor and anion produces a color change in the solution.

Research conducted to meet the needs of standard compounds in practical and research activities. The use of standard compounds improves the quality of a study. Piperine is the main secondary metabolite compound of the alkaloid group contained in Black Pepper Piper nigrum L. The isolation method used is reflux and recrystallization methods. The reflux process in absorbing piperine compounds with diethyl ether solvent will help break down the cell walls to absorb the compounds optimally. Recrystallization was repeated 7-8 times until the crystals were pale yellow. The purity test used the TLC test with a solvent ratio of n-hexane and chloroform 6:4 with an Rf value of 0.04 cm. GCMS confirmation of 85% purity, UV-Visible spectroscopic test maximum wavelength 343 with absorbance 0.865 and FTIR test confirmed wave number 928 cm-1 (CO), 996 cm-1 ((CH bending of trans –CH=CH-), 1028 cm-1(=COC sym. st.), 1250 cm-1 (=COC asym. st.), 1440 cm-1 (methylenedioxy CH2bending), 1581 cm-1 (arom. C=C st.), 1631 cm-1 (-CO-N-). Based on the confirmed test results, the isolated compound is piperine from the alkaloid group. Piperine compounds can be used as standard compound preparations for testing the purity of compounds in research and chemistry lab work on natural ingredients.