Nitrite Urinalysis Strip
Nitrite Urinalysis Strip (亚硝酸盐尿液分析试纸) is a rapid quantitative dry chemical test kit, used to detect Nitrite in human Urine specimen, based on the principle of Colorimetric method: Color Changes under Enzyme Reaction.
Please refer to the Instruction for Use (IFU) of the Nitrite Urinalysis Strip.
(Note: for urinalysis strips, the IFU is a one-for-all type, which includes introduction to all the 14 paramters.)
Detailed information of Nitrite Urinalysis Strip
- General and Technical information of this NIT test kit;
- Packing specification of this URS Dipstick test kit (gross weight in full kit package and in bulk packing);
- Specimen used to carry out the assay, and the requirements on specimen collection, storage and processing; and,
- Testing principle and reagents used in this Nitrite Urinalysis Strip.
Main technical information of this Nitrite test kit is listed in the following table:
|Catalog No.:||NIT 01|
|Description:||Nitrite Urinalysis Strip|
|No. of Step:|
|Reading Time:||60 Seconds|
|Cut Off:||13-22 µmol/L|
|Quan. or Qual.:||Quantitative|
|Assay Principle:||Color Changes under Enzyme Reaction|
The standard kit size of this Nitrite URS Dipstick Kit is 100 Tests; 240 boxes per carton. The size of outer box, dimension of master carton, gross weight information is as follow:
|Tests per Kit:||100 Tests|
|Dimension of Kit Box:||5.0 * 5.0 * 10.8 CM|
|Boxes per Carton:||240 Kits|
|Tests per Carton (BULK):||N/A|
|G.W. per Carton (Boxed):||22.0 KG|
|G.W. per Carton (Bulk):||22.0 KG|
|Carton Dimension:||53 * 45 * 36 CM|
|Carton Volume:||0.085 CBM|
- Urine dip strip: 100 pieces in airproof tube;
- Disposable urine cup (Optional);
- Color chart for reading results;
- Instruction For Use (IFU).
To carry out the assay with a Nitrite Urinalysis Strip, Urine should be collected according to the instructions given in the Instruction For Use included in the test kit. After collecting, it is preferable to perform the testing as early as possible; if not viable, the specimen should be stored properly. A general introduction about the collection, and storage of the specimens is given below.
A urine specimen must be collected in a clean and dry container.
For hormone test such as HCG prenancy test, the first urine specimen in the morning is preferred since it generally contains the highest concentration of hormone, although urine specimens collected at any time of the day may be used.
Urine specimens exhibiting visible particles should be centrifuged, filtered, or allowed to settle to obtain clear specimen for testing.
Urine Storage Condition
Urine specimens may be stored at 2-8°C for up to 48 hours prior to testing. For long-term storage, specimens may be frozen and stored below -20°C.
Frozen specimens should be thawed and mixed before testing.
Color Changes under Enzyme Reaction method is used in this Nitrite Urinalysis Strip to detect the Nitrite in human Urine specifically. The introduction of this Color Changes under Enzyme Reaction testing principle and reagent composition is given blow.
The test is based on the principle of Griess’s test and is specific for nitrite. The reaction reveals the presence of nitrite and hence indirectly of nitrite-forming (Gram Negative) bacteria in the urine by a pink discoloration of the test patch. Even a slight pink coloration is indicative of significant bacteriuria. Prolonged urinary retention in the bladder (4-8hours) is essential in order to obtain an accurate result. Administration of antibiotics or chemical drugs should be discontinued 3 days before the test.
Reagent Composition of Nitrite Urinalysis Strip: 1.5% w/w p-sulfanilic acid; 1.5% w/w N-(1-Naphthyl)Ethylenediamine; 97% nonreactive ingredients.