Lovibond Single Method 56I701210 - THPS Instruction manual

THPS / 56I701210
THPS
56I701210
0 - 100 ppm
材料
试剂
包装单位
货号
KS422-碘溶液 0.1N
50 mL
56L042250
KS445-PSSA 溶液
65 mL
56L044565
KS444-DSP 溶液
65 mL
56L044465
THPS Reagent 4, 40 g
粉剂 / 50 g
56P047550
KS527-1 N 醋酸锌
65 mL
56L052765
它還需要以下配件。
附件
包装单位
货号
塑料注射器 10 ml
1片
56A008601
带盖滴定容器,，塑料，60毫升
1片
56A006701
滤光片 Gf/C，25 mm
1片
56A019950
Titration Burette, 1 mL
1片
56A011101
Syringe Micro Burette
1片
56A011201
应用列表
• 冷却水
• 消毒控制
2
ZH Method Reference Book 1.0
THPS / 56I701210
备注
1.
2.
3.
4.
5.
6.
Under some circumstances, e.g. especially where a cationic surfactant is part
of the THPS formulation dosed to the water, temperature may have an effect on
the titration. Therefore for maximum accuracy, it is best to carry out the titration
consistently between 20°C - 25°C.
Samples should be analysed without delay. If samples need to be cooled, fill a
sample bottle to the top and cap to minimise the risk of oxidation with the air.
Samples should be filtered using a GF/C filter if suspended matter is present.
If hydrogen sulphide is present in the sample, 20 ml of sample must be pre-treated
with 10 drops Zinc Acetate Solution. A white precipitate will then form and must
be removed using a GF/C filter. Continue to step 2 with 10ml of this pre-treated
sample.
THPS Reagent 2 is added to mask interference to the titration end point caused by
the presence of cationic surfactants. If it is known that cationic surfactants are not
present and you are seeing a sharp blue black end point without the reagent 2, this
stage may be omitted.
For maximum accuracy, make up the THPS standard solutions fresh when
needed and use them without delay.
ZH Method Reference Book 1.0
3
THPS / 56I701210
步骤
1.
2.
3.
4.
5.
6.
7.
8.
9.
取 1.0 mL THPS 试剂 1，用去离子水稀释至 10 mL，轻轻混合以产生滴定剂。
取 10 毫升冷却样品（见注释 1-4）。
用注射器向滴定瓶中加入 2 毫升 THPS 试剂 3 溶液并旋转混合。
滴加 6 滴 THPS 试剂 2 并旋转混合。
加入一勺 THPS 试剂 4 旋转混合。
使用 1 mL 注射器和针头，用准备好的滴定剂（步骤 1）进行滴
定，滴定终点为蓝/黑色，旋转后不会立即消失（见注释 4）。
注：配制 THPS 试剂 1 时，确保针尖低于液体表面。
记录滴定度 (S)。这是处理过的样品。
使用 10 mL 空白样品（不含 THPS 的系统水）重复步骤 2-5。记录滴定度 (B)。(这
是未经处理的样品）。
计算：
计算 THPS（四羟甲基硫酸磷）的方法如下：THPS 浓度（ppm）= (S-B) x 1.02
4
ZH Method Reference Book 1.0
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