碘離子和汞離子在強(qiáng)堿性條件下,會(huì)與氨反應(yīng)生成淡紅棕色絡(luò)合物 ,此顏色在波長(zhǎng)420nm處會(huì)有強(qiáng)烈的吸收。而生成的這類紅棕色絡(luò)合物的吸光度 會(huì)與其溶液的氨氮含量 成正比,可用測(cè)試反應(yīng)液的吸收值 而測(cè)定氨氮 的含量。<span background-color:#f5f5f5;"="">安全術(shù)語(yǔ)S13：Keep away from food, drink and animal feeding stuffs.遠(yuǎn)離食品、飲料和動(dòng)物飼料保存。S26：In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.眼睛接觸后，立即用大量水沖洗并征求醫(yī)生意見(jiàn)。S28：After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).皮膚接觸后，立即用大量...（由生產(chǎn)廠家）沖洗。S36/37/39：Wear suitable protective clothing, gloves and eye/face protection.穿戴適當(dāng)?shù)姆雷o(hù)服、手套和眼睛/面保護(hù)。
