Test Method for Dissolved Copper In Electrical Insulating Oil By Atomic Absorption Spectrophotometry

2021 ◽  
Author(s):  
1967 ◽  
Vol 13 (2) ◽  
pp. 101-114 ◽  
Author(s):  
David L Trudeau ◽  
Esther F Freier

Abstract The determination of calcium in biologic fluids by atomic absorption spectrophotometry is interfered with by the presence of protein, cations, and those anions that form complexes with calcium. Such interference was overcome when lanthanum was included in a 1:50 dilution of serum or urine. Recovery of calcium added to calcium-free serum was 100%. The S.D. based on double-blind duplicates was 0.22 mg./lOO ml. Excellent statistical agreement was found between the test method and each of the 2 reference methods.


2021 ◽  
Vol 48 (4) ◽  
pp. 281-290
Author(s):  
Meilya Farika Indah ◽  
Norsita Agustina

Cempaka District is the largest traditional gold mining site in South Kalimantan Province. The purpose of this study was to identify levels of mercury (Hg), degree of acidity (pH) and health risk factors (age, years of service and completeness of PPE) in PETI workers in Cempaka District. The method used in this research is an observational method which is quantitative in nature with a cross-pontong approach, with a proportional difference test method. Sampling was carried out in the upstream and downstream areas. Measurement of water mercury levels was measured by means of Cold Vapor Atomic Absorption Spectrophotometry (CV-AAS) at the Industrial Research and Standardization Center (BARISTAND) in Banjarbaru City. As for the health risk factor variables using the method of observation and interviews with a questionnaire. The research sample was 40 active PETI workers. The results showed that the quality of water with mercury content exceeds the threshold, for the parameter of acidity (pH) within the norm limit of 6-9. Meanwhile, for health risk factors, PETI workers are mostly old, have worked ≥ 5 years and do not completely use PPE. Suggestions are to pay attention not to dispose of waste mercury (Hg) content into rivers. Keywords : Mercury levels ( Hg ); degrees acidity ( pH ); health risk factors; the workers Abstrak Kecamatan Cempaka merupakan tempat penambangan emas tradisional yang terbesar di Provinsi Kalimantan Selatan. Tujuan penelitian ini adalah untuk mengidentifikasi besar kadar merkuri (Hg), derajat keasaman (pH) dan faktor risiko kesehatan (Umur, masa kerja dan kelengkapan APD) pada pekerja PETI di Kecamatan Cempaka. Metode yang digunakan dalam penelitian ini yaitu metode observasional yang bersifat kuantitatif dengan pendekatan potong lintang, dengan metode uji-beda proporsi. Pengambilan sampel dilakukan pada daerah hulu dan hilir. Pengukuran kadar merkuri air diukur dengan alat Cold Vapor Atomic Absorption Spectrophotometry (CV-AAS) di Balai Riset dan Standarisasi Industri (BARISTAND) di Kota Banjarbaru. Sedangkan untuk variabel faktor risiko kesehatan menggunakan metode pengamatan dan wawancara dengan kuosioner. Sampel penelitian adalah pekerja PETI yang aktif sebanyak 40 responden. Hasil penelitian menunjukkan kualitas air dengan kandungan kadar merkuri melebihi ambang batas, untuk parameter derajat keasaman (pH) dalam batas norma sebesar 6-9. Sedangkan untuk faktor risiko kesehatan, pekerja PETI lebih banyak berumur tua , masa kerja ≥ 5 tahun dan tidak lengkap menggunakan APD. Saran untuk memperhatikan untuk tidak membuang limbah kandungan kadar merkuri (Hg) ke aliran sungai. Kata kunci : Kadar Merkuri (Hg); Derajat Keasaman (pH); Faktor Risiko kesehatan; Pekerja PETI


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