美国CHEMetrics R-4605C型甲醛填充盒
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
是使用K-4605C型甲醛测试盒中的补充品。
规格参数：
| 产品类型 | Formaldehyde — VACUettes® Refill |
| 产品型号 | R-4605C |
| 测试方法 | Purpald |
| 测试次数 | 30次/盒 |
| 产品价格 | 咨询上海益朗仪器有限公司 |
| 辅助器具 | C-4601C型低范围甲醛比色筒、C-4610C型高范围甲醛比色板、A-4201型甲醛活化剂溶液、A-4202型甲醛活化剂溶液、A-0018型稀释鲷鱼杯、A-0015型小型微测试管、A-0014型25mL样品杯帽 |
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.