美国CHEMetrics K-1503型氨测试盒
用于测试水中氨含量。例如：饮用水，清洁地表水，优质硝化废水，海水。该***盒需要使用CHEMetrics直读光度计（V-2000/V-3000）或13mm圆形比色皿的分光光度计。
规格参数：
| 产品类型 | Ammonia — Vacu-vials® Kit |
| 产品型号 | K-1503 |
| 测试范围 | 0-7.00 ppm |
| 测试方法 | 直接奈瑟琳化方法 |
| 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 | 30支安瓿瓶。1瓶稳定剂溶液、1个25mL样品杯、1个1mL***器、1支空白安瓿瓶、1份说明书 |
Vacu-vials® 是美国CHEMetrics的专利（专利号：3,634,038）。
美国CHEMetrics 氨测试盒
Visual Kits
| 测试范围 | MDL | 测试方法 | 测试盒货号 | 填充盒货号 |
| 0-4 & 0-80 ppm | 0.125 ppm | Hydroxybenzyl Alcohol (HBA) | K-1420 | R-1402 |
| 0-125 & 0-2500 ppm | 8 ppm | Hydroxybenzyl Alcohol (HBA) | K-1420D | R-1402D |
| 0-500 & 0-10000 ppm | 30 ppm | Hydroxybenzyl Alcohol (HBA) | K-1420B | R-1402B |
| 0-1 & 1-10 ppm | 0.05 ppm | 直接奈瑟琳化方法 | K-1510 | R-1501 |
| 0-30 & 30-300 ppm | 5 ppm | 直接奈瑟琳化方法 | K-1510D | R-1501D |
| 0-60 & 60-600 ppm | 10 ppm | 直接奈瑟琳化方法 | K-1510A | R-1501A |
| 0-120 & 120-1200 ppm | 20 ppm | 直接奈瑟琳化方法 | K-1510B | R-1501B |
| 0-1000 & 1000-10,000 ppm | 100 ppm | 直接奈瑟琳化方法 | K-1510C | R-1501C |
Instrumental Kits
| 测试范围 | 测试方法 | 测试包目录 |
| 0-3.00 & 0-60.0 ppm | Hydroxybenzyl Alcohol (HBA) | K-1413 |
| 0-7.00 ppm | 直接奈瑟琳化方法 | K-1503 |
| 0-14.0 ppm | 直接奈瑟琳化方法 | K-1523 |
Methods
Low-level ammonia nitrogen may be naturally present in water as a result of the biological decay of plant and animal matter. Higher concentrati*** in surface waters can indicate contamination from waste treatment facilities, raw sewage, industrial effluents (particularly from petroleum refineries), or fertilizer runoff. Excessive ammonia concentrati*** are toxic to aquatic life.
The Direct Nesslerization Method
Reference: ASTM D 1426-08, Ammonia Nitrogen in Water, Test Method A. APHA Standard Methods, 18th ed., Method 4500-NH3 C – 1988.
The test kits employing the well-established Nessler reagent* to determine ammonia concentrati*** are applicable to drinking water, clean surface water, good-quality nitrified wastewater effluent, and seawater. In some waters, calcium and magnesium concentrati*** can cause cloudiness of the reagent. Adding a few drops of stabilizer solution (Rochelle Salt) will prevent this cloudiness. References recommend distilling samples prior to analysis. Results are expressed as ppm (mg/L) ammonia-nitrogen, NH3-N.
Shelf-life: although the Nessler reagent is stable, its high alkali content attacks the glass ampoule. The resulting precipitate interferes with color comparison. We recommend stocking quantities of CHEMets® and VACUettes® ampoules that will be used within five months. A two-month supply of Vacu-vials ampoules is suggested. Refrigeration will dramatically extend the shelf-life of these products.
*Contains mercury. Dis***e according to local, state or federal laws.
The Hydroxybenzyl Alcohol (HBA) Method
References: Krom, Michael D., Spectrophotometric Determination of Ammonia: A Study of a Modified Berthelot Reduction Using Salicylate and Dichloroisocyanurate, The Analyst, V105, pp. 305-316, 1980.
In the ammonia test method that employs the Hydroxybenzyl Alcohol chemistry, free ammonia reacts with hypochlorite to form monochloramine. Monochloramine reacts with HBA, in the presence of sodium nitroferricyanide, to form a green colored complex. This test method measures the sum of free ammonia and monochloramine. Results are expressed in ppm (mg/L) ammonia-nitrogen, NH3-N.
The Hydroxybenzyl Alcohol Method offers sensitivity similar to the Nesslerization Method and there is no generation of mercury-containing waste.