bubble_chart REAGENT Sulfide standard solution 500μg/mL, matrix: 0.025mol/L NaOH, uncertainty (k=2): 5% ฿800.00 ข้อมูล
bubble_chart REAGENT Sulfide water quality standard sample 4.44μg/mL, matrix: zinc sulfide colloid ฿500.00 ข้อมูล