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"Latar Belakang: Asam tioglikolat (TGA) yang digunakan sebagai bahan baku corrosion inhibitor dapat menghasilkan H2S (hidrogen sulfida) dan memajan kesehatan pekerja. Tujuan penelitian adalah menganalisis tingkat risiko H2S dari TGA dalam produk CI beserta usulan pengendalian risiko di perusahaan. Metodologi: Chemical Health Risk Assessment (CHRA) menurut DOSH versi 2018 pada dua unit kerja terpajan di PT. X, yaitu Unit kerja 1 (area produksi) dan Unit Kerja 2 (area warehouse). Hasil: Sesuai DOSH, tingkat risiko kesehatan gas H2S termasuk hazard rating (HR) = 5. Analisis exposure rating (ER) secara kualitatif menunjukkan ER area produksi (4) lebih tinggi dari ER di area warehouse (3) karena perbedaan frequency-duration rating (FDR) antar unit kerja. Dengan menghubungkan Magnitude rating (MR) saat aktivitas membuka tutup drum CI = 4, tingkat risiko kesehatan berada pada high risk level (RR = 20 Unit Kerja 1; RR = 15 Unit Kerja 2). Kesimpulan: Risiko kesehatan akibat pajanan H2S dari CI termasuk pada high risk level menurut CHRA DOSH dan langkah utama yang perlu dilakukan adalah subsitusi untuk menurunkan level risiko. Kesesuaian langkah pengendalian teknis, administratif, dan APD sangat penting saat TGA digunakan dalam produk corrosion inhibitor.

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Background: Thioglycolic acid (TGA) is used as iron ion reduction in corrosion inhibitor which can produce H2S (hydrogen sulfide) and expose to human health. The purpose of this research is to analyze the risk level of H2S exposure from CI along with the proposed risk control in the company. Methodology: Chemical Health Risk Assessment (CHRA) according to DOSH (2018) in two exposed work units in PT. X (Work Unit 1 as production area and Work Unit 2 as warehouse area). Result: According to DOSH, the hazard rating of H2S is 5. Qualitative exposure rating (ER) analysis shows the ER of the production area (4) is higher than ER in the warehouse area (3) due to the difference in frequency-duration rating (FDR). By considering the Magnitude rating (MR) during drums opening is 4, the level of health risk is at high risk level (RR Work Units 1 = 20; RR Work Units 2 = 15). Conclusion: H2S exposure from CI is at high risk level according to CHRA DOSH and the main required control is substitution to reduce the risk level. Adequacy of technical, administrative, and PPE control measures is critical when TGA is used in corrosion inhibitor."

"Pencemaran lingkungan oleh logam berat timbal (Pb2+) telah menjadi perhatian serius karena dampaknya yang merugikan kesehatan manusia, seperti kerusakan ginjal dan neurotoksisitas pada anak-anak. Studi terbaru menunjukkan bahwa nanopartikel emas dapat digunakan sebagai sensor kolorimetri untuk mendeteksi timbal secara visual melalui sifat optik resonansi plasmon permukaan. Gugus tiol (-SH) dalam asam tioglikolat dapat digunakan sebagai konjugat karena memiliki ikatan S-Au yang kuat, sementara gugus karboksil (-COOH) digunakan sebagai reseptor spesifik untuk Pb2+, yang menyebabkan agregasi dan meningkatkan stabilitas nanopartikel emas. Penelitian ini bertujuan mengembangkan metode kolorimetri menggunakan asam tioglikolat dengan spektrofotometri UV-Visible yang terjangkau dan praktis. Karakterisasi hasil metode dilakukan dengan mikroskop transmisi elektron (TEM) dan Fourier Transform Infrared Spectroscopy (FTIR). Kondisi analisis optimum diperoleh dengan AuNPs volume 700 μL, asam tioglikolat 500 μM, pH 10,0 selama 10 menit. Hasil optimasi sintesis nanopartikel emas-tioglikolat dapat mendeteksi timbal hingga batas deteksi 9,5 ppm dengan serapan mencapai 0,3. Respon kolorimetri sensor cukup selektif terhadap Pb2+ setelah diuji bersama ion logam Ba2+, Mn2+, Cu2+, Mg2+, dan Hg2+. Aplikasi metode pada air di Danau Kenanga, FMIPA, dan Puspa Universitas Indonesia menunjukkan kadar timbal dalam sampel di bawah konsentrasi deteksi. Penelitian ini berhasil mengembangkan sensor kolorimetri TGA-AuNPs yang sederhana, cepat, mudah digunakan, dan murah untuk deteksi Pb2+ dalam air secara real-time.

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Environmental pollution by heavy metal lead (Pb2+) had become a serious concern due to its detrimental effects on human health, such as kidney damage and neurotoxicity in children. Recent studies showed that gold nanoparticles could be used as a colorimetric sensor to detect lead visually through the optical properties of surface plasmon resonance. The thiol group (-SH) in thioglycolic acid was used as a conjugate due to its strong S-Au bond. The carboxyl group (-COOH) served as a specific receptor for Pb2+ causing aggregation and enhancing the stability of the gold nanoparticles. This study aimed to develop a colorimetric method using thioglycolic acid with affordable and practical UV-Visible spectrophotometry. The characterization of the method results was performed using transmission electron microscopy (TEM) and Fourier Transform Infrared Spectroscopy (FTIR). The optimal analysis conditions were obtained with 700¼L of AuNPs, 500 μM of thioglycolic acid, and pH 10.0 for 10 minutes. The optimized synthesis of gold-thioglycolic nanoparticles could detect lead with a detection limit of 9.5 ppm and an absorbance of 0.3. The colorimetric sensor response was sufficiently selective for Pb2+ after being tested with Ba2+, Mn2+, Cu2+, Mg2+, and Hg2+ metal ions. The method's application to water samples from Lake Kenanga, FMIPA, and Puspa at the University of Indonesia showed lead levels below the detectable concentration. Thus, this study successfully developed a simple, fast, easy-to-use, and inexpensive TGA-AuNPs colorimetric sensor for real-time Pb2+ detection in water."