美国CHEMetrics K-4605A型甲醛测试盒
用于测试水中甲醛含量。例如：工业生产用水，废水应用; 不适用于海水
规格参数：
| 产品类型 | Formaldehyde — VACUettes® Visual High Range Kit |
| 产品型号 | K-4605A |
| 测试范围 | 0-60 & 60-600 ppm |
| 测试目盛 | 0, 10, 15, 20, 30, 40, 50, 60 & 60, 120, 180, 240, 300, 360, 420, 480, 600 ppm |
| 检测下限 | 10 ppm |
| 测试时间 | 12分钟 |
| 测试方法 | Purpald |
| 测试次数 | 30次/盒 |
| 标准配置 | 1盒填充盒、1支低范围甲醛比色筒、1块高范围甲醛比色板、2瓶甲醛活化剂溶液、1个稀释鲷鱼杯、1个小型微测试管、1个25mL样品杯帽、1份说明书 |
| 产品价格 | 咨询上海益朗仪器有限公司 |
CHEMets®是美国CHEMetrics的专利（专利号：3,634,038）。
美国CHEMetrics 甲醛测试盒
Visual Kits
| 测试范围 | MDL | 测试方法 | 测试盒货号 | 填充盒货号 |
| 0-1 & 1-10 ppm | 0.1 ppm | Purpald | K-4605 | R-4605 |
| 0-30 & 30-300 ppm | 5 ppm | Purpald | K-4605D | R-4605D |
| 0-60 & 60-600 ppm | 10 ppm | Purpald | K-4605A | R-4605A |
| 0-120 & 120-1200 ppm | 20 ppm | Purpald | K-4605B | R-4605B |
| 0-1200 & 1200-12000 ppm | 200 ppm | Purpald | K-4605C | R-4605C |
Method
Formaldehyde, a toxic substance, is used in the following applicati***: metal plating baths, textile treatments, biological specimen preservatives, and disinfectants of medical equipment. Commercial formaldehyde gas is readily soluble in water.
The Purpald Method
Reference: Purpald® developed by Aldrich Chemical Co.
Purpald® is subject to fewer interferences than Schiff’s reagent or chromotropic acid procedures. A purple-colored complex is formed when Purpald in alkaline solution reacts with formaldehyde. Results are expressed as ppm (mg/L) CH2O.
Shelf-life of the Purpald Reagent: five months. We recommend stocking quantities that will be used within four months.