SUPELCO
Potassium chloride solution (nominal 0.147 mS/cm)
氯化钾 溶液
Certified sec. standard reference buffer solution
二级标准缓冲物质 pH 4.005
COD Standard Solution, CRM
Quinaldine Red
TLC Silica gel 60 F254
2,2,2-Trifluoro-N-methyl-N-(trimethylsilyl)acetamide
Diphenylamine-4-sulfonic Acid Sodium Salt
Potassium Chloride
氯化钾
pH-indicator paper pH 5.5-9.0
di-Sodium hydrogen phosphate solution
Ammonium Cell Test
铵测试管
Formamide
甲酰胺
Calcium Test
铬酸盐测试, Chromate Test