CN112577914A - 一种水硬度的测定方法 - Google Patents
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- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 33
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- 239000012482 calibration solution Substances 0.000 claims abstract description 12
- 230000003139 buffering effect Effects 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 229940058020 2-amino-2-methyl-1-propanol Drugs 0.000 claims description 3
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000006172 buffering agent Substances 0.000 claims 1
- 238000007865 diluting Methods 0.000 claims 1
- 239000011259 mixed solution Substances 0.000 claims 1
- 239000012087 reference standard solution Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 5
- 239000012086 standard solution Substances 0.000 description 5
- 238000002798 spectrophotometry method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 2
- 238000007542 hardness measurement Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000013558 reference substance Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
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Abstract
一种水硬度的测定方法,将混装有0mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的零刻度点进行标定;将混装有N mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的满刻度点进行标定,N为正整数;将混装有待测定水硬度水样、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,测定所述水样的水硬度。
Description
技术领域
本发明属于分析测量技术领域,特别涉及一种水硬度的测定方法,可用于分光光度法测量水硬度。
背景技术
水硬度的测定在化工、环保、医疗、能源等许多部门都是很重要和经常性的,具有广泛需求。目前水硬度的测定方法较多,但也存在某些不足之处。如EDTA络合滴定法、高锰酸钾氧化还原滴定法和重量法等灵敏度较低;离子选择性电极法所用的水硬度电极则干扰多,性能不稳定且使用寿命短故不受欢迎;原子吸收光谱法需对钙镁分别测定加之仪器价格较高不便普及;分光光度法的研究报告较多,但基本上对水样中钙或鎂的单一测定或分别测定,仍与水硬度的灵敏度、稳定性、快速测定要求有距离。这些方法一般只能在实验室进行,不能满足现场的快速简便检测要求。
发明内容
本发明的目的是提供一种用于分光光度法快速简便测量水硬度的测定方法。
本发明实施例之一,一种水硬度的测定方法,
将混装有0mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的零刻度点进行标定;
将混装有500mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的满刻度点进行标定,N为正整数;
将混装有待测定水硬度水样、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,测定所述水样的水硬度。
具体实施方式
实施例一。一种水硬度的测定方法,技术参数条件包括:
选择分光光度法波长:470nm。
选择标定用基准物质:以国家标准物质中心的1000mg/L的水硬度基准标准溶液。
提供特效的显色试剂:(1~5)mmol/L钙镁试剂。
提供特效的缓冲试剂:2-氨基-2-甲基-1-丙醇(8~10.5)mol/L、氯化钠(0.01~0.02)mol/L混合溶液。
提供一种定时的测定时间节点,从而达到精确测量的目的,时间节点:(40~60)秒。
一种水硬度的测定方法,包括步骤:
1、准备实验用水,试剂配制所用水均为实验室一级水,或同等纯度的水。
2、水硬度标准溶液母液ρ=1000mg/L:购买国家标准物质中心的1000mg/L的水硬度基准标准溶液。
3、0mg/L水硬度校准溶液:实验室一级水。
4、500mg/L水硬度校准溶液:将1000mg/L的水硬度基准标准溶液用实验用水稀释一倍。
5、水硬度显色剂:(1~5)mmol/L钙镁试剂。
6、水硬度缓冲剂:2-氨基-2-甲基-1-丙醇(8~10.5)mol/L、氯化钠(0.01~0.02)mol/L混合溶液。
7、0mg/L水硬度标定:
比色管中加入10.00mL的水硬度显色试剂,再加入200μL的0mg/L水硬度校准液,混匀;再滴入3滴水硬度缓冲试剂,迅速混匀,同时按(定时的测定时间节点)倒计时标定。倒计时结束,即完成0mg/L水硬度标定。
8、500mg/L水硬度标定:
取10.00mL水硬度显色试剂于比色管中,加入200μL的500mg/L水硬度校准液,混匀;滴入3滴水硬度缓冲试剂,迅速混匀,同时按(定时的测定时间节点)倒计时标定。倒计时结束,即完成500mg/L水硬度标定。然后退出标定,进入测量状态。
9、(0mg/L~500mg/L)范围水样的水硬度测量:
取10.00mL水硬度显色试剂于比色管中,加入200μL的水样,混匀;滴入3滴水硬度缓冲试剂,迅速混匀,同时按(定时的测定时间节点)倒计时测量。倒计时结束,即完成水样的水硬度测量。
本发明的有益效果包括:
提供了一种简便、快速水硬度的测定方法;
提供了一种水硬度的测定用试剂的制备方法;
提供了一种水硬度的测定的一种定时测定的时间节点。使用本发明提供的试剂配制方法及测定方法,测量水硬度时有以下优点:测定步骤简便,快速。
值得说明的是,虽然前述内容已经参考若干具体实施方式描述了本发明创造的精神和原理,但是应该理解,本发明并不限于所公开的具体实施方式,对各方面的划分也不意味着这些方面中的特征不能组合,这种划分仅是为了表述的方便。本发明旨在涵盖所附权利要求的精神和范围内所包括的各种修改和等同布置。
Claims (5)
1.一种水硬度的测定方法,其特征在于,
将混装有0mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的零刻度点进行标定;
将混装有N mg/L水硬度校准溶液、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,对比色仪的满刻度点进行标定,N为正整数;
将混装有待测定水硬度水样、水硬度显色试剂和水硬度缓冲试剂的比色管置入比色仪,测定所述水样的水硬度。
2.根据权利要求1所述的水硬度的测定方法,其特征在于,所述的N=500。
3.根据权利要求2所述的水硬度的测定方法,其特征在于,所述500mg/L水硬度校准溶液制备方法是,将1000mg/L的水硬度基准标准溶液用实验用水稀释一倍。
4.根据权利要求2所述的水硬度的测定方法,其特征在于,所述的水硬度缓冲剂是,2-氨基-2-甲基-1-丙醇(8~10.5)mol/L、氯化钠(0.01~0.02)mol/L混合溶液。
5.一种水硬度的测定用试剂的制备方法,其特征在于,包括,
在容器中加入10.00mL的水硬度显色试剂,再加入200μL的水硬度校准液,混匀;
滴入3滴水硬度缓冲试剂,迅速混匀。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1087723A (zh) * | 1993-05-27 | 1994-06-08 | 天津市锅炉压力容器学会设计研究所 | 锅炉水的硬度快速测定方法及其测定仪器 |
CN102749324A (zh) * | 2011-04-21 | 2012-10-24 | 吴庆晖 | 水硬度快速检测试剂及其适用的试剂瓶、测试管和方法 |
CN105388149A (zh) * | 2015-10-27 | 2016-03-09 | 广东环凯微生物科技有限公司 | 一种水质总硬度快速检测试剂及检测方法 |
CN107228856A (zh) * | 2017-08-11 | 2017-10-03 | 中国锅炉水处理协会 | 一种锅炉给水水质硬度测试剂及其制备 |
CN108072653A (zh) * | 2016-11-28 | 2018-05-25 | 上海泓宝绿色水产股份有限公司 | 一种用于检测总硬度为0-560mg/L的总硬度检测系统及其使用方法 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1087723A (zh) * | 1993-05-27 | 1994-06-08 | 天津市锅炉压力容器学会设计研究所 | 锅炉水的硬度快速测定方法及其测定仪器 |
CN102749324A (zh) * | 2011-04-21 | 2012-10-24 | 吴庆晖 | 水硬度快速检测试剂及其适用的试剂瓶、测试管和方法 |
CN105388149A (zh) * | 2015-10-27 | 2016-03-09 | 广东环凯微生物科技有限公司 | 一种水质总硬度快速检测试剂及检测方法 |
CN108072653A (zh) * | 2016-11-28 | 2018-05-25 | 上海泓宝绿色水产股份有限公司 | 一种用于检测总硬度为0-560mg/L的总硬度检测系统及其使用方法 |
CN107228856A (zh) * | 2017-08-11 | 2017-10-03 | 中国锅炉水处理协会 | 一种锅炉给水水质硬度测试剂及其制备 |
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