Certified sec. standard reference buffer solution

二级标准缓冲物质 pH 6.863

COD Standard Solution, CRM

COD Standard Solution, CRM

TLC Silica gel 60 F₂₅₄

TLC Silica gel 60 F₂₅₄

2-Thiobarbituric Acid

Glycolic Acid

pH-indicator strips pH 2.5-4.5

Chromium(III) potassium sulfate dodecahydrate

Bromophenol Red

3′,3′′-Dibromophenolsulfonphthalein, BPR

Ammonium Cell Test

铵测试管

m-Cresol Purple

m-Cresolsulfonphthalein, 2′,2′′-Dimethylphenolsulfonphthalein, MCP

Calcium chloride tetrahydrate

Chromate Test

铬酸盐测试

Chromolith^® CapRod^® RP-18 endcapped 50-0.2 trap capillary column